CA494877A - Automatic telephone systems - Google Patents

Automatic telephone systems

Info

Publication number: CA494877A
Authority: CA; Canada
Prior art keywords: telephone systems; automatic telephone; automatic; systems; telephone
Prior art date: 1953-07-28
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

CA494877A

Other languages

Inventor

F. Ffolliott Charles

Original Assignee

Northern Electric Co Ltd

Publication date

1953-07-28

1953-07-28 Application granted granted Critical

1953-07-28 Publication of CA494877A publication Critical patent/CA494877A/en

Status Expired legal-status Critical Current

CA494877A Automatic telephone systems Expired CA494877A (en)

Application Number	Priority Date	Filing Date	Title
CA494877T

Publication Number	Publication Date
CA494877A true CA494877A (en)	1953-07-28

Application Number	Title	Priority Date	Filing Date
CA494877A Expired CA494877A (en)			Automatic telephone systems

Country	Link
CA (1)	CA494877A (en)

Publication	Publication Date	Title
CA490689A (en)	1953-02-17	Automatic telephone systems
CA493919A (en)	1953-06-23	Automatic telephone systems
CA494877A (en)	1953-07-28	Automatic telephone systems
CA496610A (en)	1953-10-06	Automatic telephone systems
CA497640A (en)	1953-11-10	Automatic telephone systems
CA495231A (en)	1953-08-11	Automatic telephone system
CA491104A (en)	1953-03-10	Telephone systems
CA493123A (en)	1953-05-26	Telephone systems
CA493483A (en)	1953-06-09	Telephone systems
CA493485A (en)	1953-06-09	Telephone systems
CA493486A (en)	1953-06-09	Telephone systems
CA493889A (en)	1953-06-23	Telephone systems
CA494014A (en)	1953-06-30	Telephone systems
CA495874A (en)	1953-09-08	Telephone systems
CA496513A (en)	1953-09-29	Telephone systems
CA496514A (en)	1953-09-29	Telephone systems
CA496858A (en)	1953-10-13	Telephone systems
CA497078A (en)	1953-10-20	Telephone systems
CA497326A (en)	1953-11-03	Telephone systems
CA497641A (en)	1953-11-10	Telephone systems
CA497642A (en)	1953-11-10	Telephone systems
CA498036A (en)	1953-12-01	Telephone systems
CA498037A (en)	1953-12-01	Telephone systems
CA498762A (en)	1953-12-29	Telephone systems
CA498859A (en)	1953-12-29	Telephone systems