CA200074A - Telephone exchange system - Google Patents

Telephone exchange system

Info

Publication number: CA200074A
Authority: CA; Canada
Prior art keywords: exchange system; telephone exchange; telephone; exchange
Prior art date: 1920-05-11
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

CA200074A

Other languages

French (fr)

Inventor

H. Clark Edgar

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.)

INTERNATIONAL WESTERN ELECTRIC CO

AT&T Corp

Original Assignee

INTERNATIONAL WESTERN ELECTRIC CO

Western Electric Co Inc

Publication date

1920-05-11

1920-05-11 Application granted granted Critical

1920-05-11 Publication of CA200074A publication Critical patent/CA200074A/en

Status Expired legal-status Critical Current

Links

CA200074A Telephone exchange system Expired CA200074A (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
CA200074T

Publications (1)

Publication Number	Publication Date
CA200074A true CA200074A (en)	1920-05-11

Family

ID=35074511

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
CA200074A Expired CA200074A (en)			Telephone exchange system

Country Status (1)

Country	Link
CA (1)	CA200074A (en)

0
- CA CA200074A patent/CA200074A/en not_active Expired

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