CA512312A - Telephone systems - Google Patents

Telephone systems

Info

Publication number: CA512312A
Authority: CA; Canada
Prior art keywords: telephone systems; telephone; systems
Prior art date: 1955-04-26
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

CA512312A

Other languages

Inventor

E. Lomax Clarence

Original Assignee

Northern Electric Co Ltd

Publication date

1955-04-26

1955-04-26 Application granted granted Critical

1955-04-26 Publication of CA512312A publication Critical patent/CA512312A/en

Status Expired legal-status Critical Current

CA512312A Telephone systems Expired CA512312A (en)

Application Number	Priority Date	Filing Date	Title
CA512312T

Publication Number	Publication Date
CA512312A true CA512312A (en)	1955-04-26

Application Number	Title	Priority Date	Filing Date
CA512312A Expired CA512312A (en)			Telephone systems

Country	Link
CA (1)	CA512312A (en)

Publication	Publication Date	Title
CA511747A (en)	1955-04-12	Telephone systems
CA512083A (en)	1955-04-19	Telephone systems
CA510190A (en)	1955-02-15	Telephone systems
CA510665A (en)	1955-03-08	Telephone systems
CA512309A (en)	1955-04-26	Telephone systems
CA512310A (en)	1955-04-26	Telephone systems
CA512311A (en)	1955-04-26	Telephone systems
CA512312A (en)	1955-04-26	Telephone systems
CA519014A (en)	1955-11-29	Telephone systems
CA508827A (en)	1955-01-04	Communication systems
CA512163A (en)	1955-04-26	Communication systems
CA512301A (en)	1955-04-26	Intercommunication telephone systems
CA512519A (en)	1955-05-03	Party-line telephone systems
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
AU211197B2 (en)	1956-01-05	Improvements in telephone systems
AU207899B2 (en)	1955-10-13	Improvements in telephone systems
AU202974B2 (en)	1955-09-22	Improvements in telephone systems
AU204681B2 (en)	1956-04-26	Improvements in telephone systems
AU205630B2 (en)	1955-11-10	Improvements in telephone systems
AU208819B2 (en)	1956-03-22	Improvements in telephone systems
AU209625B2 (en)	1956-01-26	Improvements in telephone systems
AU211198B2 (en)	1956-01-05	Improvements in telecommunication systems