CA471686A - Automatic telephone and like selective signalling systems - Google Patents

Automatic telephone and like selective signalling systems

Info

Publication number
CA471686A
CA471686A CA471686DA CA471686A CA 471686 A CA471686 A CA 471686A CA 471686D A CA471686D A CA 471686DA CA 471686 A CA471686 A CA 471686A
Authority
CA
Canada
Prior art keywords
automatic telephone
signalling systems
selective signalling
selective
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
Other languages
French (fr)
Inventor
Tyler Vosper William
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 CA471686A publication Critical patent/CA471686A/en
Expired legal-status Critical Current

Links

CA471686D Automatic telephone and like selective signalling systems Expired CA471686A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA471686T

Publications (1)

Publication Number Publication Date
CA471686A true CA471686A (en) 1951-02-20

Family

ID=35605635

Family Applications (1)

Application Number Title Priority Date Filing Date
CA471686D Expired CA471686A (en) Automatic telephone and like selective signalling systems

Country Status (1)

Country Link
CA (1) CA471686A (en)

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