CA491419A - Appareil de telephone a haut parleur - Google Patents

Appareil de telephone a haut parleur

Info

Publication number
CA491419A
CA491419A CA491419A CA491419DA CA491419A CA 491419 A CA491419 A CA 491419A CA 491419 A CA491419 A CA 491419A CA 491419D A CA491419D A CA 491419DA CA 491419 A CA491419 A CA 491419A
Authority
CA
Canada
Prior art keywords
telephone set
loud speaking
speaking telephone
loud
telephone
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
CA491419A
Other languages
English (en)
Inventor
K. Potter Ralph
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.)
AT&T Corp
Original Assignee
Western Electric Co Inc
Publication date
Application granted granted Critical
Publication of CA491419A publication Critical patent/CA491419A/fr
Expired legal-status Critical Current

Links

CA491419A Appareil de telephone a haut parleur Expired CA491419A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA491419T

Publications (1)

Publication Number Publication Date
CA491419A true CA491419A (fr) 1953-03-17

Family

ID=35631161

Family Applications (1)

Application Number Title Priority Date Filing Date
CA491419A Expired CA491419A (fr) Appareil de telephone a haut parleur

Country Status (1)

Country Link
CA (1) CA491419A (fr)

Similar Documents

Publication Publication Date Title
CA491419A (fr) Appareil de telephone a haut parleur
CA609908A (en) Tone controlled telephone answering device
CA497074A (fr) Instruments electromagnetiques de telephones
CA497260A (fr) Service de telephone prive
CA492259A (fr) Branchement de telephone
CA498642A (fr) Haut-parleurs
CA491767A (fr) Recepteur de telephone
CA491718A (fr) Microphones
CA491719A (fr) Systeme telephonique
CA493484A (fr) Systeme telephonique
CA493424A (fr) Systeme telephonique
CA498037A (fr) Systemes telephoniques
CA493123A (fr) Systemes telephoniques
CA493483A (fr) Systemes telephoniques
CA493485A (fr) Systemes telephoniques
CA493889A (fr) Systemes telephoniques
CA494014A (fr) Systemes telephoniques
CA495874A (fr) Systemes telephoniques
CA496514A (fr) Systemes telephoniques
CA496858A (fr) Systemes telephoniques
CA497078A (fr) Systemes telephoniques
CA497641A (fr) Systemes telephoniques
CA497642A (fr) Systemes telephoniques
CA498036A (fr) Systemes telephoniques
CA491104A (fr) Systemes telephoniques