CA493483A - Telephone systems - Google Patents

Telephone systems

Info

Publication number
CA493483A
CA493483A CA493483A CA493483DA CA493483A CA 493483 A CA493483 A CA 493483A CA 493483 A CA493483 A CA 493483A CA 493483D A CA493483D A CA 493483DA CA 493483 A CA493483 A CA 493483A
Authority
CA
Canada
Prior art keywords
telephone systems
telephone
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
CA493483A
Other languages
French (fr)
Inventor
E. Ostline John
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.)
Automatic Electric Laboratories Inc
Original Assignee
Automatic Electric Laboratories Inc
Publication date
Application granted granted Critical
Publication of CA493483A publication Critical patent/CA493483A/en
Expired legal-status Critical Current

Links

CA493483A Telephone systems Expired CA493483A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA493483T

Publications (1)

Publication Number Publication Date
CA493483A true CA493483A (en) 1953-06-09

Family

ID=35638872

Family Applications (1)

Application Number Title Priority Date Filing Date
CA493483A Expired CA493483A (en) Telephone systems

Country Status (1)

Country Link
CA (1) CA493483A (en)

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