CA447222A - Systeme telephonique - Google Patents

Systeme telephonique

Info

Publication number
CA447222A
CA447222A CA447222A CA447222DA CA447222A CA 447222 A CA447222 A CA 447222A CA 447222 A CA447222 A CA 447222A CA 447222D A CA447222D A CA 447222DA CA 447222 A CA447222 A CA 447222A
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
CA447222A
Other languages
English (en)
Inventor
F. Crocker Thomas
H. Smith Howard
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 CA447222A publication Critical patent/CA447222A/fr
Expired legal-status Critical Current

Links

CA447222A Systeme telephonique Expired CA447222A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA447222T

Publications (1)

Publication Number Publication Date
CA447222A true CA447222A (fr) 1948-03-16

Family

ID=35564901

Family Applications (1)

Application Number Title Priority Date Filing Date
CA447222A Expired CA447222A (fr) Systeme telephonique

Country Status (1)

Country Link
CA (1) CA447222A (fr)

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