CA512085A - Relay automatic telephone systems - Google Patents

Relay automatic telephone systems

Info

Publication number: CA512085A
Authority: CA; Canada
Prior art keywords: telephone systems; automatic telephone; relay automatic; relay; systems
Prior art date: 1955-04-19
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

CA512085A

Other languages

Inventor

H. Voss John

W. Jones Roy

Original Assignee

Northern Electric Co Ltd

Publication date

1955-04-19

1955-04-19 Application granted granted Critical

1955-04-19 Publication of CA512085A publication Critical patent/CA512085A/en

Status Expired legal-status Critical Current

CA512085A Relay automatic telephone systems Expired CA512085A (en)

Application Number	Priority Date	Filing Date	Title
CA512085T

Publication Number	Publication Date
CA512085A true CA512085A (en)	1955-04-19

Application Number	Title	Priority Date	Filing Date
CA512085A Expired CA512085A (en)			Relay automatic telephone systems

Country	Link
CA (1)	CA512085A (en)

Publication	Publication Date	Title
CA512085A (en)	1955-04-19	Relay automatic telephone systems
CA518930A (en)	1955-11-29	Relay automatic telephone system
CA514095A (en)	1955-06-28	All relay automatic telephone system trunk-selection
CA513766A (en)	1955-06-14	Automatic telephone systems
CA514583A (en)	1955-07-12	Automatic telephone systems
CA516975A (en)	1955-09-27	Automatic telephone systems
CA519763A (en)	1955-12-20	Automatic telephone systems
CA509545A (en)	1955-01-25	Automatic telephone system
CA526324A (en)	1956-06-12	Relay automatic telephone systems
CA521241A (en)	1956-01-31	Relay automatic telephone system
CA512081A (en)	1955-04-19	Automatic telephone exchange systems
AU202560B2 (en)	1955-10-13	Improvements in automatic telephone systems
AU212106B2 (en)	1956-06-14	Improvements relating to automatic telephone systems
CA512082A (en)	1955-04-19	Automatic telephone exchange system
CA512312A (en)	1955-04-26	Telephone systems
CA519014A (en)	1955-11-29	Telephone systems
CA510665A (en)	1955-03-08	Telephone systems
CA512310A (en)	1955-04-26	Telephone systems
CA510190A (en)	1955-02-15	Telephone systems
CA511747A (en)	1955-04-12	Telephone systems
CA512083A (en)	1955-04-19	Telephone systems
CA512309A (en)	1955-04-26	Telephone systems
CA512311A (en)	1955-04-26	Telephone systems
AU821255A (en)	1955-10-13	Improvements in automatic telephone systems
CA518929A (en)	1955-11-29	Telephone systems utilizing odd-even relay