Nothing Special   »   [go: up one dir, main page]

CA507617A - Telephone systems - Google Patents

Telephone systems

Info

Publication number
CA507617A
CA507617A CA507617A CA507617DA CA507617A CA 507617 A CA507617 A CA 507617A CA 507617 A CA507617 A CA 507617A CA 507617D A CA507617D A CA 507617DA CA 507617 A CA507617 A CA 507617A
Authority
CA
Canada
Prior art keywords
telephone systems
telephone
systems
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.)
Expired
Application number
CA507617A
Other languages
French (fr)
Inventor
E. Humphries Horace
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens Brothers and Co Ltd
Original Assignee
Siemens Brothers and Co Ltd
Publication date
Application granted granted Critical
Publication of CA507617A publication Critical patent/CA507617A/en
Expired legal-status Critical Current

Links

CA507617A Telephone systems Expired CA507617A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA507617T

Publications (1)

Publication Number Publication Date
CA507617A true CA507617A (en) 1954-11-23

Family

ID=35653561

Family Applications (1)

Application Number Title Priority Date Filing Date
CA507617A Expired CA507617A (en) Telephone systems

Country Status (1)

Country Link
CA (1) CA507617A (en)

Similar Documents

Publication Publication Date Title
CA507617A (en) Telephone systems
CA501321A (en) Telephone systems
CA502236A (en) Telephone systems
CA502238A (en) Telephone systems
CA502239A (en) Telephone systems
CA506411A (en) Telephone systems
CA499356A (en) Telephone systems
CA507200A (en) Telecommunication systems
CA504867A (en) Selective calling system
CA501908A (en) Telephone receiving system
CA507871A (en) Telecommunication system
CA500363A (en) Mobile telephone systems
CA500705A (en) Radio telephone systems
CA500362A (en) Automatic telephone systems
CA503173A (en) Automatic telephone systems
CA505485A (en) Automatic telephone systems
CA500638A (en) Automatic telephone systems
AU203647B2 (en) Improvements in telephone systems
AU204127B2 (en) Improvements in telephone systems
AU205275B2 (en) Improvements in telephone systems
AU209351B2 (en) Improvements relating to telephone systems
CA505876A (en) Telephone signaling system
CA505804A (en) Telephone signalling system
CA499833A (en) Radiotelephone systems
CA510665A (en) Telephone systems