CA441180A - Systeme telephonique - Google Patents

Systeme telephonique

Info

Publication number
CA441180A
CA441180A CA441180A CA441180DA CA441180A CA 441180 A CA441180 A CA 441180A CA 441180 A CA441180 A CA 441180A CA 441180D A CA441180D A CA 441180DA CA 441180 A CA441180 A CA 441180A
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
CA441180A
Other languages
English (en)
Inventor
Earl Woodruff Albert
Original Assignee
Automatic Electric Laboratories Inc
Associated Telephone and Telegraph Co
Publication date
Application granted granted Critical
Publication of CA441180A publication Critical patent/CA441180A/fr
Expired legal-status Critical Current

Links

CA441180A Systeme telephonique Expired CA441180A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA441180T

Publications (1)

Publication Number Publication Date
CA441180A true CA441180A (fr) 1947-05-06

Family

ID=35556412

Family Applications (1)

Application Number Title Priority Date Filing Date
CA441180A Expired CA441180A (fr) Systeme telephonique

Country Status (1)

Country Link
CA (1) CA441180A (fr)

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