CA420146A - Appareil de signaux de telephone - Google Patents

Appareil de signaux de telephone

Info

Publication number
CA420146A
CA420146A CA420146A CA420146DA CA420146A CA 420146 A CA420146 A CA 420146A CA 420146 A CA420146 A CA 420146A CA 420146D A CA420146D A CA 420146DA CA 420146 A CA420146 A CA 420146A
Authority
CA
Canada
Prior art keywords
telephone signal
signal appliance
appliance
telephone
signal
Prior art date
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
CA420146A
Other languages
English (en)
Inventor
C. Porter Robert
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
WILLIS A KELSO
Original Assignee
WILLIS A KELSO
Publication date
Application granted granted Critical
Publication of CA420146A publication Critical patent/CA420146A/fr
Expired legal-status Critical Current

Links

CA420146A Appareil de signaux de telephone Expired CA420146A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA420146T

Publications (1)

Publication Number Publication Date
CA420146A true CA420146A (fr) 1944-05-09

Family

ID=35531068

Family Applications (1)

Application Number Title Priority Date Filing Date
CA420146A Expired CA420146A (fr) Appareil de signaux de telephone

Country Status (1)

Country Link
CA (1) CA420146A (fr)

Similar Documents

Publication Publication Date Title
CA420146A (fr) Appareil de signaux de telephone
CA421073A (fr) Timbre electrique avertisseur
AU123695B2 (en) Improved cabinet
CA423688A (fr) Circuit d'instrument telephonique
CA423466A (fr) Dispositif du cadran de telephone
CA420936A (fr) Sous-station telephonique
CA418315A (fr) Systeme telephonique
CA421424A (fr) Systeme telephonique
CA423180A (fr) Systeme telephonique
CA417943A (fr) Systeme telephonique
CA418339A (fr) Systeme telephonique
CA418615A (fr) Systeme telephonique
CA418617A (fr) Systeme telephonique
CA419526A (fr) Systeme telephonique
CA420335A (fr) Systeme telephonique
CA420570A (fr) Systeme telephonique
CA420937A (fr) Systeme telephonique
CA420938A (fr) Systeme telephonique
CA421036A (fr) Systeme telephonique
CA421423A (fr) Systeme telephonique
CA421770A (fr) Systeme telephonique
CA421771A (fr) Systeme telephonique
CA422031A (fr) Systeme telephonique
CA422193A (fr) Systeme telephonique
CA422195A (fr) Systeme telephonique