CA218678A - Semi-automatic telephone system - Google Patents

Semi-automatic telephone system

Info

Publication number: CA218678A
Authority: CA; Canada
Prior art keywords: semi; telephone system; automatic telephone; automatic; telephone
Prior art date: 1922-05-16
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

CA218678A

Other languages

French (fr)

Inventor

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

Original Assignee

INTERNATIONAL WESTERN ELECTRIC Co

Publication date

1922-05-16

1922-05-16 Application granted granted Critical

1922-05-16 Publication of CA218678A publication Critical patent/CA218678A/en

Status Expired legal-status Critical Current

Links

CA218678A Semi-automatic telephone system Expired CA218678A (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
CA218678T

Publications (1)

Publication Number	Publication Date
CA218678A true CA218678A (en)	1922-05-16

Family

ID=35113122

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
CA218678A Expired CA218678A (en)			Semi-automatic telephone system

Country Status (1)

Country	Link
CA (1)	CA218678A (en)

0
- CA CA218678A patent/CA218678A/en not_active Expired

Similar Documents

Publication	Publication Date	Title
CA215088A (en)	1922-01-10	Telephone system
CA218678A (en)	1922-05-16	Semi-automatic telephone system
CA215085A (en)	1922-01-10	Telephone system
CA215090A (en)	1922-01-10	Telephone system
CA215093A (en)	1922-01-10	Telephone system
CA215094A (en)	1922-01-10	Telephone system
CA215097A (en)	1922-01-10	Telephone system
CA215098A (en)	1922-01-10	Telephone system
CA216058A (en)	1922-02-21	Telephone system
CA216524A (en)	1922-03-07	Telephone system
CA218021A (en)	1922-04-25	Telephone system
CA218022A (en)	1922-04-25	Telephone system
CA218023A (en)	1922-04-25	Telephone system
CA218025A (en)	1922-04-25	Telephone system
CA218937A (en)	1922-05-23	Telephone system
CA219453A (en)	1922-06-06	Telephone system
CA219454A (en)	1922-06-06	Telephone system
CA220102A (en)	1922-06-27	Telephone system
CA220170A (en)	1922-06-27	Telephone system
CA220458A (en)	1922-07-04	Telephone system
CA220744A (en)	1922-07-11	Telephone system
CA221433A (en)	1922-07-25	Telephone system
CA222141A (en)	1922-08-08	Telephone system
CA222508A (en)	1922-08-15	Telephone system
CA227462A (en)	1922-12-26	Telephone system