CA477986A - Telephone systems - Google Patents

Telephone systems

Info

Publication number: CA477986A
Authority: CA; Canada
Prior art keywords: telephone systems; telephone; systems
Prior art date: 1951-10-23
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

CA477986A

Other languages

Inventor

S. Peterson Edward

Original Assignee

Automatic Electric Laboratories Inc

Publication date

1951-10-23

1951-10-23 Application granted granted Critical

1951-10-23 Publication of CA477986A publication Critical patent/CA477986A/en

Status Expired legal-status Critical Current

CA477986A Telephone systems Expired CA477986A (en)

Application Number	Priority Date	Filing Date	Title
CA477986T

Publication Number	Publication Date
CA477986A true CA477986A (en)	1951-10-23

Application Number	Title	Priority Date	Filing Date
CA477986A Expired CA477986A (en)			Telephone systems

Country	Link
CA (1)	CA477986A (en)

Publication	Publication Date	Title
CA470842A (en)	1951-01-16	Telephone systems
CA472098A (en)	1951-03-13	Telephone systems
CA476517A (en)	1951-08-28	Telephone systems
CA477986A (en)	1951-10-23	Telephone systems
CA471340A (en)	1951-02-06	Telecommunication systems
CA478316A (en)	1951-11-06	Communication systems
CA474073A (en)	1951-05-29	Communication systems
CA474843A (en)	1951-06-26	Communication systems
CA475541A (en)	1951-07-24	Communication systems
CA470778A (en)	1951-01-09	Communication systems
CA470777A (en)	1951-01-09	Communication systems
AU155049B2 (en)	1951-04-09	Telecommunication system
CA476115A (en)	1951-08-14	Telephone transmission systems
CA478159A (en)	1951-10-30	Telephone exchange systems
CA478353A (en)	1951-11-06	Automatic telephone systems
CA477173A (en)	1951-09-25	Automatic telephone systems
CA473443A (en)	1951-05-08	Multiple-tuned wave-selector systems
CA471394A (en)	1951-02-06	Frequency-stabilizing systems
CA471939A (en)	1951-03-06	Telephone call box systems
AU157231B2 (en)	1951-07-19	Improvements in telecommunication systems
CA472013A (en)	1951-03-06	Two way carrier telephone systems
AU154739B2 (en)	1951-08-02	Improvements relating to telephone systems
CA470526A (en)	1951-01-02	Party line telephone systems
CA472856A (en)	1951-04-10	Ranging systems
AU79151A (en)	1951-04-09	Telecommunication system