CA232451A - Exchange telephone system - Google Patents

Exchange telephone system

Info

Publication number: CA232451A
Authority: CA; Canada
Prior art keywords: telephone system; exchange telephone; exchange; telephone
Prior art date: 1923-07-03
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

CA232451A

Other languages

French (fr)

Inventor

Adam Christian 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.)

Siemens Brothers and Co Ltd

Original Assignee

Siemens Brothers and Co Ltd

Publication date

1923-07-03

1923-07-03 Application granted granted Critical

1923-07-03 Publication of CA232451A publication Critical patent/CA232451A/en

Status Expired legal-status Critical Current

Links

CA232451A Exchange telephone system Expired CA232451A (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
CA232451T

Publications (1)

Publication Number	Publication Date
CA232451A true CA232451A (en)	1923-07-03

Family

ID=35129824

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
CA232451A Expired CA232451A (en)			Exchange telephone system

Country Status (1)

Country	Link
CA (1)	CA232451A (en)

0
- CA CA232451A patent/CA232451A/en not_active Expired

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