CA530323A - Automatic telephone-exchange systems - Google Patents

Automatic telephone-exchange systems

Info

Publication number
CA530323A
CA530323A CA530323A CA530323DA CA530323A CA 530323 A CA530323 A CA 530323A CA 530323 A CA530323 A CA 530323A CA 530323D A CA530323D A CA 530323DA CA 530323 A CA530323 A CA 530323A
Authority
CA
Canada
Prior art keywords
automatic telephone
exchange systems
exchange
systems
telephone
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
CA530323A
Other languages
French (fr)
Inventor
B. Johnson Benjamin
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.)
Telephone Manufacturing Co Ltd
Original Assignee
Telephone Manufacturing Co Ltd
Publication date
Application granted granted Critical
Publication of CA530323A publication Critical patent/CA530323A/en
Expired legal-status Critical Current

Links

CA530323A Automatic telephone-exchange systems Expired CA530323A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA530323T

Publications (1)

Publication Number Publication Date
CA530323A true CA530323A (en) 1956-09-11

Family

ID=35684076

Family Applications (1)

Application Number Title Priority Date Filing Date
CA530323A Expired CA530323A (en) Automatic telephone-exchange systems

Country Status (1)

Country Link
CA (1) CA530323A (en)

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