CA623789A - Automatic telephone exchange systems - Google Patents

Automatic telephone exchange systems

Info

Publication number
CA623789A
CA623789A CA623789A CA623789DA CA623789A CA 623789 A CA623789 A CA 623789A CA 623789 A CA623789 A CA 623789A CA 623789D A CA623789D A CA 623789DA CA 623789 A CA623789 A CA 623789A
Authority
CA
Canada
Prior art keywords
telephone exchange
automatic telephone
exchange systems
systems
automatic
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
CA623789A
Inventor
J. Warman Bloomfield
R. Ewington Ronald
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 Edison Swan Ltd
Original Assignee
Siemens Edison Swan Ltd
Publication date
Application granted granted Critical
Publication of CA623789A publication Critical patent/CA623789A/en
Expired legal-status Critical Current

Links

CA623789A Automatic telephone exchange systems Expired CA623789A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA623789T

Publications (1)

Publication Number Publication Date
CA623789A true CA623789A (en) 1961-07-11

Family

ID=35878968

Family Applications (1)

Application Number Title Priority Date Filing Date
CA623789A Expired CA623789A (en) Automatic telephone exchange systems

Country Status (1)

Country Link
CA (1) CA623789A (en)

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