CA277231A - Telephone exchange system - Google Patents

Telephone exchange system

Info

Publication number: CA277231A
Authority: CA; Canada
Prior art keywords: exchange system; telephone exchange; telephone; exchange
Prior art date: 1928-01-17
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

CA277231A

Other languages

French (fr)

Inventor

J. Wynne James

E. Lundell Alben

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

1928-01-17

1928-01-17 Application granted granted Critical

1928-01-17 Publication of CA277231A publication Critical patent/CA277231A/en

Status Expired legal-status Critical Current

Links

CA277231A Telephone exchange system Expired CA277231A (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
CA277231T

Publications (1)

Publication Number	Publication Date
CA277231A true CA277231A (en)	1928-01-17

Family

ID=35210322

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
CA277231A Expired CA277231A (en)			Telephone exchange system

Country Status (1)

Country	Link
CA (1)	CA277231A (en)

0
- CA CA277231A patent/CA277231A/en not_active Expired

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