CA427452A - Transmetteur a clavier d'appels telephoniques - Google Patents

Transmetteur a clavier d'appels telephoniques

Info

Publication number
CA427452A
CA427452A CA427452A CA427452DA CA427452A CA 427452 A CA427452 A CA 427452A CA 427452 A CA427452 A CA 427452A CA 427452D A CA427452D A CA 427452DA CA 427452 A CA427452 A CA 427452A
Authority
CA
Canada
Prior art keywords
telephone call
key operated
call transmitter
operated telephone
transmitter
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
CA427452A
Other languages
English (en)
Inventor
Donat Richard Charles
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.)
AT&T Corp
Original Assignee
Western Electric Co Inc
Bell Telephone Laboratories Inc
Publication date
Application granted granted Critical
Publication of CA427452A publication Critical patent/CA427452A/fr
Expired legal-status Critical Current

Links

CA427452A Transmetteur a clavier d'appels telephoniques Expired CA427452A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA427452T

Publications (1)

Publication Number Publication Date
CA427452A true CA427452A (fr) 1945-05-08

Family

ID=35538482

Family Applications (1)

Application Number Title Priority Date Filing Date
CA427452A Expired CA427452A (fr) Transmetteur a clavier d'appels telephoniques

Country Status (1)

Country Link
CA (1) CA427452A (fr)

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