CA677709A - Telephone exchange systems - Google Patents

Telephone exchange systems

Info

Publication number
CA677709A
CA677709A CA677709A CA677709DA CA677709A CA 677709 A CA677709 A CA 677709A CA 677709 A CA677709 A CA 677709A CA 677709D A CA677709D A CA 677709DA CA 677709 A CA677709 A CA 677709A
Authority
CA
Canada
Prior art keywords
telephone exchange
exchange systems
systems
telephone
exchange
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
CA677709A
Inventor
F. Smith Sydney
Drake Bernard
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.)
Associated Electrical Industries Ltd
Original Assignee
Associated Electrical Industries Ltd
Publication date
Application granted granted Critical
Publication of CA677709A publication Critical patent/CA677709A/en
Expired legal-status Critical Current

Links

CA677709A Telephone exchange systems Expired CA677709A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA677709T

Publications (1)

Publication Number Publication Date
CA677709A true CA677709A (en) 1964-01-07

Family

ID=35978794

Family Applications (1)

Application Number Title Priority Date Filing Date
CA677709A Expired CA677709A (en) Telephone exchange systems

Country Status (1)

Country Link
CA (1) CA677709A (en)

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