CA307864A - Systeme telephonique - Google Patents

Systeme telephonique

Info

Publication number
CA307864A
CA307864A CA307864A CA307864DA CA307864A CA 307864 A CA307864 A CA 307864A CA 307864 A CA307864 A CA 307864A CA 307864D A CA307864D A CA 307864DA CA 307864 A CA307864 A CA 307864A
Authority
CA
Canada
Prior art keywords
telephone system
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
CA307864A
Other languages
English (en)
Inventor
Kessler Frank
George Forster Albert
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 Telephone and Telegraph Co
Original Assignee
Associated Telephone and Telegraph Co
Publication date
Application granted granted Critical
Publication of CA307864A publication Critical patent/CA307864A/fr
Expired legal-status Critical Current

Links

CA307864A Systeme telephonique Expired CA307864A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA307864T

Publications (1)

Publication Number Publication Date
CA307864A true CA307864A (fr) 1931-01-20

Family

ID=35261016

Family Applications (1)

Application Number Title Priority Date Filing Date
CA307864A Expired CA307864A (fr) Systeme telephonique

Country Status (1)

Country Link
CA (1) CA307864A (fr)

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