CA429735A - Telephone switchboard - Google Patents

Telephone switchboard

Info

Publication number: CA429735A
Authority: CA; Canada
Prior art keywords: telephone switchboard; switchboard; telephone
Prior art date: 1945-08-28
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

CA429735A

Other languages

French (fr)

Inventor

Donahue Robb Theodore

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.)

AT&T Corp

Original Assignee

Western Electric Co Inc

Bell Telephone Laboratories Inc

Publication date

1945-08-28

1945-08-28 Application granted granted Critical

1945-08-28 Publication of CA429735A publication Critical patent/CA429735A/en

Status Expired legal-status Critical Current

Links

CA429735A Telephone switchboard Expired CA429735A (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
CA429735T

Publications (1)

Publication Number	Publication Date
CA429735A true CA429735A (en)	1945-08-28

Family

ID=35544739

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
CA429735A Expired CA429735A (en)			Telephone switchboard

Country Status (1)

Country	Link
CA (1)	CA429735A (en)

0
- CA CA429735A patent/CA429735A/en not_active Expired

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