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CA442718A - Systeme telephonique - Google Patents

Systeme telephonique

Info

Publication number
CA442718A
CA442718A CA442718A CA442718DA CA442718A CA 442718 A CA442718 A CA 442718A CA 442718 A CA442718 A CA 442718A CA 442718D A CA442718D A CA 442718DA CA 442718 A CA442718 A CA 442718A
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
CA442718A
Other languages
English (en)
Inventor
Kessler Frank
Henry Voss 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
Associated Telephone and Telegraph Co
Original Assignee
Automatic Electric Laboratories Inc
Associated Telephone and Telegraph Co
Publication date
Application granted granted Critical
Publication of CA442718A publication Critical patent/CA442718A/fr
Expired legal-status Critical Current

Links

CA442718A Systeme telephonique Expired CA442718A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA442718T

Publications (1)

Publication Number Publication Date
CA442718A true CA442718A (fr) 1947-07-08

Family

ID=35557945

Family Applications (1)

Application Number Title Priority Date Filing Date
CA442718A Expired CA442718A (fr) Systeme telephonique

Country Status (1)

Country Link
CA (1) CA442718A (fr)

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