CA447221A - Telephone system - Google Patents

Telephone system

Info

Publication number
CA447221A
CA447221A CA447221A CA447221DA CA447221A CA 447221 A CA447221 A CA 447221A CA 447221 A CA447221 A CA 447221A CA 447221D A CA447221D A CA 447221DA CA 447221 A CA447221 A CA 447221A
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
CA447221A
Other languages
French (fr)
Inventor
Ellis Ostline John
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 CA447221A publication Critical patent/CA447221A/en
Expired legal-status Critical Current

Links

CA447221A Telephone system Expired CA447221A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA447221T

Publications (1)

Publication Number Publication Date
CA447221A true CA447221A (en) 1948-03-16

Family

ID=35564900

Family Applications (1)

Application Number Title Priority Date Filing Date
CA447221A Expired CA447221A (en) Telephone system

Country Status (1)

Country Link
CA (1) CA447221A (en)

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