CA467438A - Telephone and like signalling systems - Google Patents

Telephone and like signalling systems

Info

Publication number
CA467438A
CA467438A CA467438A CA467438DA CA467438A CA 467438 A CA467438 A CA 467438A CA 467438 A CA467438 A CA 467438A CA 467438D A CA467438D A CA 467438DA CA 467438 A CA467438 A CA 467438A
Authority
CA
Canada
Prior art keywords
telephone
signalling systems
signalling
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
CA467438A
Other languages
French (fr)
Inventor
Adam Christian David
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 CA467438A publication Critical patent/CA467438A/en
Expired legal-status Critical Current

Links

CA467438A Telephone and like signalling systems Expired CA467438A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA467438T

Publications (1)

Publication Number Publication Date
CA467438A true CA467438A (en) 1950-08-15

Family

ID=35597207

Family Applications (1)

Application Number Title Priority Date Filing Date
CA467438A Expired CA467438A (en) Telephone and like signalling systems

Country Status (1)

Country Link
CA (1) CA467438A (en)

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