CA445443A - Systeme telephonique - Google Patents

Systeme telephonique

Info

Publication number
CA445443A
CA445443A CA445443A CA445443DA CA445443A CA 445443 A CA445443 A CA 445443A CA 445443 A CA445443 A CA 445443A CA 445443D A CA445443D A CA 445443DA CA 445443 A CA445443 A CA 445443A
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
CA445443A
Other languages
English (en)
Inventor
E. Paterson Seth
A. Johnson Vincent
Original Assignee
Automatic Electric Laboratories Inc
Associated Telephone and Telegraph Co
Publication date
Application granted granted Critical
Publication of CA445443A publication Critical patent/CA445443A/fr
Expired legal-status Critical Current

Links

CA445443A Systeme telephonique Expired CA445443A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA445443T

Publications (1)

Publication Number Publication Date
CA445443A true CA445443A (fr) 1947-12-09

Family

ID=35563098

Family Applications (1)

Application Number Title Priority Date Filing Date
CA445443A Expired CA445443A (fr) Systeme telephonique

Country Status (1)

Country Link
CA (1) CA445443A (fr)

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