CA411945A - Telephone switching apparatus - Google Patents

Telephone switching apparatus

Info

Publication number: CA411945A
Authority: CA; Canada
Prior art keywords: switching apparatus; telephone switching; telephone; switching
Prior art date: 1943-04-20
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

CA411945A

Other languages

Inventor

Frederick Obergfell Herbert

Original Assignee

Northern Electric Co Ltd

Publication date

1943-04-20

1943-04-20 Application granted granted Critical

1943-04-20 Publication of CA411945A publication Critical patent/CA411945A/en

Status Expired legal-status Critical Current

CA411945A Telephone switching apparatus Expired CA411945A (en)

Application Number	Priority Date	Filing Date	Title
CA411945T

Publication Number	Publication Date
CA411945A true CA411945A (en)	1943-04-20

Application Number	Title	Priority Date	Filing Date
CA411945A Expired CA411945A (en)			Telephone switching apparatus

Country	Link
CA (1)	CA411945A (en)

Publication	Publication Date	Title
CA411946A (en)	1943-04-20	Telephone switching apparatus
CA413014A (en)	1943-06-08	Telephone switching apparatus
CA413013A (en)	1943-06-08	Telephone switching apparatus
CA417045A (en)	1943-12-14	Eectrical switching apparatus
CA416795A (en)	1943-11-30	Telegraph switching apparatus
CA415424A (en)	1943-09-28	Telephone substation apparatus
CA415423A (en)	1943-09-28	Telephone substation apparatus
CA415346A (en)	1943-09-21	Telephone substation apparatus
CA414258A (en)	1943-08-03	Electrical switching apparatus
CA416046A (en)	1943-10-26	Telephone set
CA416352A (en)	1943-11-09	Telephone set
CA416045A (en)	1943-10-26	Telephone set
CA412794A (en)	1943-05-25	Telephone selective switch
CA409235A (en)	1942-12-08	Telephone switching apparatus
CA411741A (en)	1943-04-13	Telephone system
CA416367A (en)	1943-11-09	Telephone system
CA416351A (en)	1943-11-09	Telephone system
CA411807A (en)	1943-04-13	Telephone system
CA411409A (en)	1943-03-30	Telephone system
CA410075A (en)	1943-01-19	Telephone system
CA411343A (en)	1943-03-23	Telephone system
CA410266A (en)	1943-01-26	Telephone system
CA415344A (en)	1943-09-21	Telephone system
CA413708A (en)	1943-07-06	Telephone system
CA416951A (en)	1943-12-07	Telephone system