CA452488A - Systeme telephonique - Google Patents

Systeme telephonique

Info

Publication number
CA452488A
CA452488A CA452488A CA452488DA CA452488A CA 452488 A CA452488 A CA 452488A CA 452488 A CA452488 A CA 452488A CA 452488D A CA452488D A CA 452488DA CA 452488 A CA452488 A CA 452488A
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
CA452488A
Other languages
English (en)
Inventor
H. Ryan William
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 CA452488A publication Critical patent/CA452488A/fr
Expired legal-status Critical Current

Links

CA452488A Systeme telephonique Expired CA452488A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA452488T

Publications (1)

Publication Number Publication Date
CA452488A true CA452488A (fr) 1948-11-09

Family

ID=35570218

Family Applications (1)

Application Number Title Priority Date Filing Date
CA452488A Expired CA452488A (fr) Systeme telephonique

Country Status (1)

Country Link
CA (1) CA452488A (fr)

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