CA466372A - Systeme avertisseur pour appels telephoniques - Google Patents

Systeme avertisseur pour appels telephoniques

Info

Publication number: CA466372A
Authority: CA; Canada
Prior art keywords: call system; alarm call; telephone alarm; telephone; call
Prior art date: 1950-07-04
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

CA466372A

Other languages

Inventor

E. Lomax Clarence

Original Assignee

Northern Electric Co Ltd

Publication date

1950-07-04

1950-07-04 Application granted granted Critical

1950-07-04 Publication of CA466372A publication Critical patent/CA466372A/fr

Status Expired legal-status Critical Current

CA466372A Systeme avertisseur pour appels telephoniques Expired CA466372A (fr)

Application Number	Priority Date	Filing Date	Title
CA466372T

Publication Number	Publication Date
CA466372A true CA466372A (fr)	1950-07-04

Application Number	Title	Priority Date	Filing Date
CA466372A Expired CA466372A (fr)			Systeme avertisseur pour appels telephoniques

Country	Link
CA (1)	CA466372A (fr)

Publication	Publication Date	Title
CA466372A (fr)	1950-07-04	Systeme avertisseur pour appels telephoniques
CA462640A (fr)	1950-01-24	Systeme telephonique
CA462890A (fr)	1950-01-31	Systeme telephonique
CA465294A (fr)	1950-05-23	Systeme de telephone
CA467358A (fr)	1950-08-15	Systemes telephoniques
CA468167A (fr)	1950-09-19	Systemes telephoniques
CA468566A (fr)	1950-10-03	Transmetteurs d'appels telephoniques
CA464612A (fr)	1950-04-25	Systeme de signalisation telephonique
CA463923A (fr)	1950-03-21	Transmetteur d'appel telephonique
CA471939A (fr)	1951-03-06	Systemes de guerites telephoniques
CA467438A (fr)	1950-08-15	Systemes telephoniques et analogues
CA474041A (fr)	1951-05-29	Systemes d'interception d'appels telephoniques
CA462927A (fr)	1950-01-31	Systeme de communication a haut-parleurs
CA465588A (fr)	1950-05-30	Systeme enregistreur d'appels telephoniques
CA470842A (fr)	1951-01-16	Systemes telephoniques
CA472098A (fr)	1951-03-13	Reseaux telephoniques
CA476517A (fr)	1951-08-28	Systemes telephoniques
CA477986A (fr)	1951-10-23	Systemes telephoniques
CA453798A (fr)	1949-01-04	Systeme telephonique
CA454136A (fr)	1949-01-18	Systeme telephonique
CA454334A (fr)	1949-01-25	Systeme telephonique
CA456764A (fr)	1949-05-17	Systeme telephonique
CA457823A (fr)	1949-07-05	Systeme telephonique
CA457980A (fr)	1949-07-05	Systeme telephonique
CA458674A (fr)	1949-08-02	Systeme telephonique