CA563277A - Systeme de transmission de signaux sonores de telephone - Google Patents

Systeme de transmission de signaux sonores de telephone

Info

Publication number: CA563277A
Authority: CA; Canada
Prior art keywords: signal transmission; transmission system; telephone ringing; ringing; telephone
Prior art date: 1958-09-16
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

CA563277A

Other languages

English (en)

Inventor

C. Weller David

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

1958-09-16

1958-09-16 Application granted granted Critical

1958-09-16 Publication of CA563277A publication Critical patent/CA563277A/fr

Status Expired legal-status Critical Current

Links

230000005540 biological transmission Effects 0.000 title 1

CA563277A Systeme de transmission de signaux sonores de telephone Expired CA563277A (fr)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
CA563277T

Publications (1)

Publication Number	Publication Date
CA563277A true CA563277A (fr)	1958-09-16

Family

ID=35729722

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
CA563277A Expired CA563277A (fr)			Systeme de transmission de signaux sonores de telephone

Country Status (1)

Country	Link
CA (1)	CA563277A (fr)

0
- CA CA563277A patent/CA563277A/fr not_active Expired

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