CA477986A - Telephone systems - Google Patents

Telephone systems

Info

Publication number
CA477986A
CA477986A CA477986A CA477986DA CA477986A CA 477986 A CA477986 A CA 477986A CA 477986 A CA477986 A CA 477986A CA 477986D A CA477986D A CA 477986DA CA 477986 A CA477986 A CA 477986A
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
CA477986A
Other languages
French (fr)
Inventor
S. Peterson Edward
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 CA477986A publication Critical patent/CA477986A/en
Expired legal-status Critical Current

Links

CA477986A Telephone systems Expired CA477986A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA477986T

Publications (1)

Publication Number Publication Date
CA477986A true CA477986A (en) 1951-10-23

Family

ID=35617636

Family Applications (1)

Application Number Title Priority Date Filing Date
CA477986A Expired CA477986A (en) Telephone systems

Country Status (1)

Country Link
CA (1) CA477986A (en)

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