CA495789A - Systeme d'enregistrement de telephone - Google Patents

Systeme d'enregistrement de telephone

Info

Publication number: CA495789A
Authority: CA; Canada
Prior art keywords: telephone system; recording telephone; recording; telephone
Prior art date: 1953-09-01
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

CA495789A

Other languages

English (en)

Inventor

J. Scudder Frederick

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

1953-09-01

1953-09-01 Application granted granted Critical

1953-09-01 Publication of CA495789A publication Critical patent/CA495789A/fr

Status Expired legal-status Critical Current

Links

CA495789A Systeme d'enregistrement de telephone Expired CA495789A (fr)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
CA495789T

Publications (1)

Publication Number	Publication Date
CA495789A true CA495789A (fr)	1953-09-01

Family

ID=35641203

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
CA495789A Expired CA495789A (fr)			Systeme d'enregistrement de telephone

Country Status (1)

Country	Link
CA (1)	CA495789A (fr)

0
- CA CA495789A patent/CA495789A/fr not_active Expired

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