CN206934217U - A kind of femoral stem and hip prosthesis - Google Patents
A kind of femoral stem and hip prosthesis Download PDFInfo
- Publication number
- CN206934217U CN206934217U CN201720104771.4U CN201720104771U CN206934217U CN 206934217 U CN206934217 U CN 206934217U CN 201720104771 U CN201720104771 U CN 201720104771U CN 206934217 U CN206934217 U CN 206934217U
- Authority
- CN
- China
- Prior art keywords
- femoral stem
- bone
- bone handle
- neck
- proximal end
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Prostheses (AREA)
Abstract
The utility model provides a kind of femoral stem and hip prosthesis, includes head, neck and shank body successively from top to bottom；The profile on the head is circular cone structure；The profile of the neck is circular cone structure；The outer surface of the neck is high polished surface；The shank body respectively is bone handle proximal end, bone handle middle-end and bone handle distal end from top to bottom；The profile of the bone handle proximal end is the pyramidal structure of three tapers；The profile of the bone handle distal end is conical structure, and its surface is high polished surface；The round and smooth connection in upper surface edge at the lower surface edge of the neck and the bone handle proximal end.Femoral stem of the present utility model, the matching of bone handle proximal end and femoral bone cavitas medullaris is enhanced, ensure good biological fixation effect and anti-rotation stability；Reduce the stress concentration of bone handle distal end and the shock to cortex bone；The generation of conical neck friction particles is reduced, and expands the scope of activities of prosthese；The insertion depth limitation of prosthese is prevented.On this basis, a kind of hip prosthesis is additionally provided.
Description
Technical field
It the utility model is related to joint prosthesis technical field, more particularly to a kind of femoral stem and hip prosthesis.
Background technology
Human hip is a kind of spherical joint, comprising a spherical femoral head and one like bowl-shape acetabular bone.Its
The joint formed by thigh (femur) and pelvis, spherical top layer and bowl endosexine cover by smooth cartilage, sliding
Cyst membrane secreting mucus make friction be reduced to minimum.When hip joint produce lesion when, cartilage is no longer smooth, synovial bursae inflammation and wither
Contracting, joint can not as usual be gone slick again.When hip joint because degeneration, lesion or wound cause pain, stiff or change
Shape, or even handicapped, when can not be with medicine or other treatment method relief of symptoms, it will usually put in a manner of operation for patient
Artificial hip joint is changed, patient is recovered daily mobility.
Artificial hip joint includes two parts：Acetabular cup and femoral stem.Fig. 1 is the femoral stem and acetabular cup of prior art
Appearance schematic diagram.As shown in figure 1, femoral stem generally includes head 1, neck 2 and the three parts of shank body 3.The neck 2 and handle of femoral stem
The connecting portion of body 3 is usually provided with neck neck 10, i.e. neck 2 and shank body 3 is not rounded slip.Also, common femoral stem is in handle
The lower end of body 3 is provided with the groove or fin set along shank body length direction, to increase stable installation effect.
However, the femoral stem of prior art is inevitably present the defects of following：
1st, neck neck 10 limits the depth that femoral stem is inserted in pulp cavity.Especially, femoral stem exists at the initial stage of implantation
Slight sinking, and neck neck 10 limits the activity, reduces the mounting stability of femoral stem.
2nd, on the one hand the outer surface of femoral stem distal end is set groove or fin add the stress concentration of pommel, easily
Shock and extruding pain of the prosthese to cortex bone are brought, and the particle added after hitting disengages.
3rd, the structure of the upper end of shank body 3 is round table-like, anti-rotation less stable.
Utility model content
The purpose of this utility model is to provide a kind of femoral stem and hip prosthesis, to solve femur of the prior art
The problems such as neck neck limitation femoral stem is sunk, easily brings shock, extruding and particle of the prosthese to cortex bone to disengage existing for handle.
To achieve these goals, the utility model uses following technical scheme：
A kind of femoral stem provided by the utility model, include head, neck and shank body successively from top to bottom；The head
Profile is circular cone structure, up-small and down-big, for connecting femur bulb；The profile of the neck is circular cone structure, it is upper it is small under
Greatly, the shank body on the head and downside of upside is connected respectively；The outer surface of the neck is high polished surface；The handle
Body respectively is bone handle proximal end, bone handle middle-end and bone handle distal end from top to bottom；The profile of the bone handle proximal end is three tapers
Pyramidal structure, it is up big and down small；The profile of the bone handle distal end is conical structure, up big and down small, and its surface is high polished surface；Institute
State the lower surface edge of neck and the round and smooth connection in upper surface edge of the bone handle proximal end.
Further, the outer surface of the bone handle proximal end is provided with ring-type rib.The technical scheme has technical effect that：Ring
Shape rib can increase the contact surface of shank body and sclerotin, strengthen the fixed effect of shank body and cortex bone.And ring-type rib is easy to
Machine-shaping, durability is good, is not easy the deformation that is worn.
Further, the outer surface of the bone handle proximal end is evenly arranged with multiple salient points.The technique effect of the technical scheme exists
In：Multiple equally distributed salient points can increase the contact surface of shank body and sclerotin, strengthen the fixed effect of shank body and cortex bone.And
And bump structure facilitates taking and using in a pre-installation.
Further, the outer surface of the bone handle proximal end is provided with titanium coating.The technical scheme has technical effect that：Titanium applies
Layer enhances surface mechanical strength, corrosion resistance and the heat resistance of femoral stem.Titanium coating is micropore mat surface, bone can be induced to grow
Enter, strengthen the fixation of femoral stem and sclerotin.
Further, the bone handle middle-end is the tapered structure of three tapers.The technical scheme has technical effect that：Three tapers
The bone handle middle-end of tapered structure, the anti-rotation stability of femoral stem is added simultaneously with the bone handle proximal end of three taper pyramidal structures.
Further, the material of the shank body is Ti-6Al-4V or Ti-6Al-7Nb.The technique effect of the technical scheme exists
In：Ti-6Al-4V is first practical titanium alloy, is succeeded in developing in 1954 by the U.S., due to its heat resistance, intensity,
Plasticity, toughness, formability, solderability, corrosion resistance and biocompatibility are preferable, and are closed as the trump in titanium alloy industry
Gold；And Ti-6Al-7Nb is the titanium alloy for having same advantage feature.
Further, the shank body is hollow setting, its cavity through the upper end of the bone handle proximal end, the bone handle middle-end and
The lower surface of the bone handle distal end.The technical scheme has technical effect that：On the one hand the shank body of hollow setting is beneficial to operation people
Member's operation installation is changed, and is on the other hand easy to the discharge of sclerotin in bone cavity.
Further, it is provided with reinforcement in the cavity of the shank body.The technical scheme has technical effect that：Reinforcement is made
With the structural strength for being to strengthen whole femoral stem.
A kind of hip prosthesis that the utility model also provides, including above-mentioned femoral stem and acetabular cup, the acetabular cup
The head is connected on by femur ball-head cover.
The beneficial effects of the utility model are：
1st, the design of neck neck is eliminated, prevents the insertion depth limitation of femoral stem.Because femoral stem is in the peace at implantation initial stage
Holding position is not one-time positioning, but has slight sinking in a period of time after the implantation.The neck neck of femoral stem is eliminated, most
It can cause femoral stem in pulp cavity in a position the most stable eventually.
2nd, the conical grip design concept that three unique tapers are fixed so that bone handle proximal end preferably matches with femoral bone cavitas medullaris,
Ensure good biological fixation effect and anti-rotation stability.
3rd, the neck conical design of high polishing reduces the production of conical neck friction particles after femoral stem is hit to greatest extent
It is raw, and the scope of activities of femoral stem can be expanded.
4th, the high polishing design of bone handle distal end, the stress concentration of shank body is reduced, femoral stem is effectively reduced and cortex bone is hit
Hit, avoid patient from the pain of thigh occur.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the technical scheme of the utility model embodiment
The required accompanying drawing used is briefly described in description.It should be evident that drawings in the following description are of the present utility model
Some embodiments, for those of ordinary skill in the art, on the premise of not paying creative work, can also basis
These accompanying drawings obtain other accompanying drawings.
Fig. 1 is the femoral stem of prior art and the appearance schematic diagram of acetabular cup；
Fig. 2 is the structural representation for the femoral stem that the utility model embodiment one provides；
Fig. 3 is the structural representation for the femoral stem that the utility model embodiment two provides；
Fig. 4 is the structural representation for the femoral stem that the utility model embodiment three provides；
Fig. 5 is the sectional view of bone handle middle-end in the femoral stem that the utility model embodiment one~tri- provides；
Fig. 6 is the longitudinal sectional view for the femoral stem that the utility model embodiment four provides；
Fig. 7 is the structural representation of hip prosthesis provided by the utility model.
Reference：
1- heads；2- necks；3- shank bodies；
31- bone handle proximal ends；32- bone handle middle-ends；33- bones handle distal end；
4- ring-type ribs；5- salient points；7- cavitys；
8- reinforcements；9- acetabular cups；10- necks are led.
Embodiment
The technical solution of the utility model is clearly and completely described below in conjunction with accompanying drawing, it is clear that described
Embodiment is the utility model part of the embodiment, rather than whole embodiments.Based on the embodiment in the utility model, sheet
The every other embodiment that field those of ordinary skill is obtained under the premise of creative work is not made, belongs to this practicality
Novel protected scope.
, it is necessary to explanation in description of the present utility model, term " " center ", " on ", " under ", it is "left", "right", " perpendicular
Directly ", the orientation of the instruction such as " level ", " interior ", " outer " or position relationship are based on orientation shown in the drawings or position relationship, are only
Described for the ease of description the utility model and simplifying, rather than instruction or imply signified device or element must have it is specific
Orientation, with specific azimuth configuration and operation, therefore it is not intended that to limitation of the present utility model.In addition, term " the
One ", " second ", " the 3rd " are only used for describing purpose, and it is not intended that instruction or hint relative importance.
, it is necessary to which explanation, unless otherwise clearly defined and limited, term " are pacified in description of the present utility model
Dress ", " connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integratedly
Connection；Can be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected by intermediary,
It can be the connection of two element internals.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition
Concrete meaning of the language in the utility model.
Embodiment one：
A kind of femoral stem is present embodiments provided, wherein：Fig. 2 is the knot for the femoral stem that the utility model embodiment one provides
Structure schematic diagram.As shown in Fig. 2 femoral stem includes head 1, neck 2 and shank body 3 successively from top to bottom.Specifically, its head 1
Profile is circular cone structure, up-small and down-big, for connecting femur bulb.And the profile of neck 2 is circular cone structure, it is upper it is small under
Greatly, the head 1 of upside and the shank body 3 of downside are connected respectively, and the outer surface of neck 2 is high polished surface.Shank body 3 from top to bottom according to
Secondary is respectively bone handle proximal end 31, bone handle middle-end 32 and bone handle distal end 33, and the profile of bone handle proximal end 31 is the pyramidal structure of three tapers,
Up big and down small, the profile of bone handle distal end 33 is conical structure, and up big and down small, its surface is high polished surface.The lower surface of neck 2
The round and smooth connection in upper surface edge at edge and bone handle proximal end 31.
Fig. 1 is the femoral stem of prior art and the appearance schematic diagram of acetabular cup, as shown in figure 1, in the conventional technology, femur
The neck 2 and the connecting portion of shank body 3 of handle are usually provided with neck neck 10, i.e. neck 2 and shank body 3 is not rounded slip.It is also, common
Femoral stem the groove or fin set along the length direction of shank body 3 is provided with the lower end of shank body 3, to increase stable installation effect
Fruit, or realize the export of marrow.However, the shortcomings that femoral stem of prior art, is：1st, neck neck 10 limits femoral stem and existed
The depth of insertion in pulp cavity；2nd, the groove or fin that 33 outer surfaces of bone handle distal end are set add shock and particle disengages；3、
The structure of the upper end of shank body 3 is round table-like, anti-rotation less stable.
The femoral stem of the present embodiment, can preferably it solve the above problems.First, the design of neck neck 10 is eliminated, is prevented
The insertion depth limitation of femoral stem.Because installation site of the femoral stem at the initial stage of implantation is not one-time positioning, but it is being implanted into
There is slight sinking in a period of time afterwards.The neck neck 10 of femoral stem is eliminated, eventually causes femoral stem to be in one in pulp cavity
Individual position the most stable.Secondly, three unique tapers fix conical grip design concept so that bone handle proximal end 31 preferably with
Femoral bone cavitas medullaris matches, and ensures good biological fixation effect and anti-rotation stability.Again, the conical design of neck 2 of high polishing
The generation of the friction particles of conical neck 2 after femoral stem is hit is reduced to greatest extent, and can expand the movable model of femoral stem
Enclose.Finally, the high polishing design of bone handle distal end 33, the stress concentration of shank body 3 is reduced, femoral stem is effectively reduced and cortex bone is hit
Hit, avoid patient from the pain of thigh occur.
In the alternative of the present embodiment, as shown in Fig. 2 femoral stem includes head 1, the and of neck 2 successively from top to bottom
Shank body 3.Specifically, the profile on its head 1 is circular cone structure, up-small and down-big, for connecting acetabular cup 9.And the profile of neck 2
Up-small and down-big for circular cone structure, the shank body 3 of the head 1 of connection upside and downside, the outer surface of neck 2 polish to be high respectively
Surface.Shank body 3 respectively is bone handle proximal end 31, bone handle middle-end 32 and bone handle distal end 33 from top to bottom, bone handle proximal end 31 it is outer
Shape is the pyramidal structure of three tapers, up big and down small, and the profile of bone handle distal end 33 is conical structure, up big and down small, and its surface is height
Polished surface.The round and smooth connection in upper surface edge at the lower surface edge and bone handle proximal end 31 of neck 2.Further, bone handle proximal end
31 outer surface is provided with ring-type rib 4.Wherein, ring-type rib 4 can increase the contact surface of shank body 3 and sclerotin, strengthen shank body 3
With the fixed effect of cortex bone.And ring-type rib 4 is easily processed into type, durability is good, is not easy the deformation that is worn.
Embodiment two：
Fig. 3 is the structural representation for the femoral stem that the utility model embodiment two provides.As shown in figure 3, femoral stem is from upper
Arrive down includes head 1, neck 2 and shank body 3 successively.Specifically, the profile on its head 1 is circular cone structure, up-small and down-big, is used for
Connect acetabular cup 9.It is up-small and down-big and the profile of neck 2 is circular cone structure, the head 1 of upside and the handle of downside are connected respectively
Body 3, the outer surface of neck 2 is high polished surface.Shank body 3 respectively is bone handle proximal end 31, the and of bone handle middle-end 32 from top to bottom
Bone handle distal end 33, the profile of bone handle proximal end 31 is the pyramidal structure of three tapers, up big and down small, and the profile of bone handle distal end 33 is circular cone
Structure, up big and down small, its surface is high polished surface.The lower surface edge of neck 2 and the upper surface edge circle of bone handle proximal end 31
Slip.Further, the outer surface of bone handle proximal end 31 is evenly arranged with multiple salient points 5.Wherein, multiple equally distributed salient points
5 can increase the contact surface of shank body 3 and sclerotin, the fixed effect of enhancing shank body 3 and cortex bone.And the structure of salient point 5 facilitates
Taking and using in a pre-installation.
Embodiment three：
Fig. 4 is the structural representation for the femoral stem that the utility model embodiment three provides.Further, bone handle proximal end 31 is outer
Surface is provided with titanium coating.Wherein, titanium coating enhances surface mechanical strength, corrosion resistance and the heat resistance of femoral stem.It is special
Ground, titanium coating are micropore mat surface, sclerotin can be induced to grow into, and strengthen femoral stem shank body 3 and the fixation of sclerotin.
Fig. 5 is the sectional view of bone handle middle-end in the femoral stem that the utility model embodiment one~tri- provides.In above-mentioned implementation
In the alternative of example, as shown in Figure 4, it is preferable that bone handle middle-end is the tapered structure of three tapers.The bone of three taper tapered structures
Handle middle-end 32, the anti-rotation stability of femoral stem is added simultaneously with the bone handle proximal end 31 of three taper pyramidal structures.
In the alternative of the present embodiment, it is preferable that the material selection Ti-6Al-4V or Ti-6Al-7Nb of shank body 3.
Wherein, Ti-6Al-4V is first practical titanium alloy, is succeeded in developing in 1954 by the U.S., due to its heat resistance, by force
Degree, plasticity, toughness, formability, solderability, corrosion resistance and biocompatibility are preferable, and as the trump in titanium alloy industry
Alloy；And Ti-6Al-7Nb is the titanium alloy for having same advantage feature.
Example IV：
Fig. 6 is the longitudinal sectional view for the femoral stem that the utility model embodiment four provides.As shown in fig. 6, femoral stem is from upper
Arrive down includes head 1, neck 2 and shank body 3 successively.Specifically, the profile on its head 1 is circular cone structure, up-small and down-big, is used for
Connect acetabular cup 9.It is up-small and down-big and the profile of neck 2 is circular cone structure, the head 1 of upside and the handle of downside are connected respectively
Body 3, the outer surface of neck 2 is high polished surface.Shank body 3 respectively is bone handle proximal end 31, the and of bone handle middle-end 32 from top to bottom
Bone handle distal end 33, the profile of bone handle proximal end 31 is the pyramidal structure of three tapers, up big and down small, and the profile of bone handle distal end 33 is circular cone
Structure, up big and down small, its surface is high polished surface.The lower surface edge of neck 2 and the upper surface edge circle of bone handle proximal end 31
Slip.Wherein, shank body 3 is hollow setting, and its cavity 7 is through the upper end of bone handle proximal end 31, bone handle middle-end 32 and bone handle distal end
33 lower surface.Wherein, the one side of shank body 3 of hollow setting be beneficial to surgical staff operation installation change, be on the other hand easy to by
The discharge of sclerotin in bone cavity.
In the alternative of the present embodiment, as shown in Figure 5,6, further, reinforcement is provided with the cavity 7 of shank body 3
Muscle 8.Reinforcement 8 acts on the structural strength for being to strengthen whole femoral stem.
A kind of hip prosthesis that the utility model also provides, Fig. 7 are the knot of hip prosthesis provided by the utility model
Structure schematic diagram.As shown in fig. 7, hip prosthesis includes above-mentioned femoral stem and acetabular cup 9, wherein acetabular cup 9 is socketed in femur
The outside of bulb.
Finally it should be noted that：Various embodiments above is only to illustrate the technical solution of the utility model, rather than it is limited
System；Although the utility model is described in detail with reference to foregoing embodiments, one of ordinary skill in the art should
Understand：It can still modify to the technical scheme described in foregoing embodiments, either to which part or whole
Technical characteristic carries out equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is departed from this practicality newly
The scope of each embodiment technical scheme of type.
Claims (9)
1. a kind of femoral stem, it is characterised in that include head, neck and shank body successively from top to bottom；
The profile on the head is circular cone structure, up-small and down-big, for connecting femur bulb；
The profile of the neck is circular cone structure, up-small and down-big, respectively the handle on the head and downside of connection upside
Body；The outer surface of the neck is high polished surface；
The shank body respectively is bone handle proximal end, bone handle middle-end and bone handle distal end from top to bottom；The profile of the bone handle proximal end
It is up big and down small for the pyramidal structure of three tapers；
The profile of the bone handle distal end is conical structure, up big and down small, and its surface is high polished surface；
The round and smooth connection in upper surface edge at the lower surface edge of the neck and the bone handle proximal end.
2. femoral stem according to claim 1, it is characterised in that the outer surface of the bone handle proximal end is provided with ring-type rib
Bar.
3. femoral stem according to claim 1, it is characterised in that the outer surface of the bone handle proximal end is evenly arranged with multiple
Salient point.
4. femoral stem according to claim 1, it is characterised in that the outer surface of the bone handle proximal end is provided with titanium coating.
5. femoral stem according to claim 1, it is characterised in that the bone handle middle-end is the pyramidal structure of three tapers.
6. femoral stem according to claim 1, it is characterised in that the material of the shank body is Ti-6Al-4V or Ti-
6Al-7Nb。
7. femoral stem according to claim 1, it is characterised in that the shank body is hollow setting, and its cavity is through described
The lower surface of the upper end of bone handle proximal end, the bone handle middle-end and the bone handle distal end.
8. femoral stem according to claim 7, it is characterised in that be provided with reinforcement in the cavity of the shank body.
9. a kind of hip prosthesis, it is characterised in that including the femoral stem and acetabular cup described in any one of claim 1~8, institute
State acetabular cup and the head is connected on by femur ball-head cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720104771.4U CN206934217U (en) | 2017-01-23 | 2017-01-23 | A kind of femoral stem and hip prosthesis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720104771.4U CN206934217U (en) | 2017-01-23 | 2017-01-23 | A kind of femoral stem and hip prosthesis |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206934217U true CN206934217U (en) | 2018-01-30 |
Family
ID=61356669
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720104771.4U Active CN206934217U (en) | 2017-01-23 | 2017-01-23 | A kind of femoral stem and hip prosthesis |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206934217U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109044569A (en) * | 2018-09-06 | 2018-12-21 | 北京安颂科技有限公司 | Type femoral bone end prosthesis and artificial hip joint |
| CN116421365A (en) * | 2023-04-11 | 2023-07-14 | 苏州爱杰硕医疗科技有限公司 | Femoral stem prosthesis and manufacturing method |
-
2017
- 2017-01-23 CN CN201720104771.4U patent/CN206934217U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109044569A (en) * | 2018-09-06 | 2018-12-21 | 北京安颂科技有限公司 | Type femoral bone end prosthesis and artificial hip joint |
| CN116421365A (en) * | 2023-04-11 | 2023-07-14 | 苏州爱杰硕医疗科技有限公司 | Femoral stem prosthesis and manufacturing method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101843533A (en) | Artificial hip joint on bone trabecula microporous surface | |
| WO2020114252A1 (en) | Toe joint prosthesis and manufacturing method therefor | |
| CN201755260U (en) | Bone trabecula micropore surface artificial hip joint | |
| CN203280542U (en) | Ionic-spray micropore tantalum coating hip joint prostheses | |
| CN206934217U (en) | A kind of femoral stem and hip prosthesis | |
| CN104622603A (en) | Combined type femoral stem | |
| CN2580920Y (en) | Femur for artificial coxa replacement | |
| CN210631347U (en) | Acetabular lining and acetabular outer cup of artificial total hip joint | |
| CN203328855U (en) | Bionic hip joint combining body | |
| CN109106474A (en) | A kind of orthopaedics implant | |
| ES2257627T3 (en) | FINGER PROTESIS. | |
| CN215019753U (en) | Outside adduction femoral stem | |
| CN203303197U (en) | Hip-joint replacement | |
| CN203244474U (en) | Hip joint simple combined handle | |
| CN212308139U (en) | Femoral prosthesis for retaining femoral head | |
| CN214967165U (en) | Combined hip joint stem-free femoral head prosthesis structure | |
| CN2118508U (en) | Carbon-titanium combined artificial thighbone | |
| CN209048363U (en) | A kind of orthopaedics implant | |
| WO2021129620A1 (en) | Flexible hip joint stem and hip joint prosthesis using same | |
| CN202751470U (en) | Taper-shank rack mortar hip joint prosthesis | |
| CN203244473U (en) | Hip joint combined stem for bone replacement transplantation | |
| CN208447854U (en) | A kind of improved femur handle structure | |
| CN103720526A (en) | Hip joint prosthesis | |
| CN103655006A (en) | Hip joint prosthesis | |
| CN215080280U (en) | Femoral stem prosthesis |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |