CA541688A - Systemes telephoniques a commande commune - Google Patents

Systemes telephoniques a commande commune

Info

Publication number: CA541688A
Authority: CA; Canada
Prior art keywords: common control; telephone systems; control telephone; systems; common
Prior art date: 1957-05-28
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

CA541688A

Other languages

English (en)

Inventor

A. Malthaner William

E. Vaughan Henry

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

Publication date

1957-05-28

1957-05-28 Application granted granted Critical

1957-05-28 Publication of CA541688A publication Critical patent/CA541688A/fr

Status Expired legal-status Critical Current

Links

CA541688A Systemes telephoniques a commande commune Expired CA541688A (fr)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
CA541688T

Publications (1)

Publication Number	Publication Date
CA541688A true CA541688A (fr)	1957-05-28

Family

ID=35698837

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
CA541688A Expired CA541688A (fr)			Systemes telephoniques a commande commune

Country Status (1)

Country	Link
CA (1)	CA541688A (fr)

0
- CA CA541688A patent/CA541688A/fr not_active Expired

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