CA542281A - Installations de telephone a haut-parleur a deux sens - Google Patents

Installations de telephone a haut-parleur a deux sens

Info

Publication number
CA542281A
CA542281A CA542281A CA542281DA CA542281A CA 542281 A CA542281 A CA 542281A CA 542281 A CA542281 A CA 542281A CA 542281D A CA542281D A CA 542281DA CA 542281 A CA542281 A CA 542281A
Authority
CA
Canada
Prior art keywords
way loudspeaker
loudspeaker telephone
telephone installations
installations
way
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
CA542281A
Other languages
English (en)
Inventor
Jeanlin Pierre
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.)
Individual
Original Assignee
Individual
Publication date
Application granted granted Critical
Publication of CA542281A publication Critical patent/CA542281A/fr
Expired legal-status Critical Current

Links

CA542281A Installations de telephone a haut-parleur a deux sens Expired CA542281A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA542281T

Publications (1)

Publication Number Publication Date
CA542281A true CA542281A (fr) 1957-06-11

Family

ID=35699439

Family Applications (1)

Application Number Title Priority Date Filing Date
CA542281A Expired CA542281A (fr) Installations de telephone a haut-parleur a deux sens

Country Status (1)

Country Link
CA (1) CA542281A (fr)

Similar Documents

Publication Publication Date Title
CA542281A (fr) Installations de telephone a haut-parleur a deux sens
CA547720A (fr) Dispositifs d'appel
CA538498A (fr) Systemes telephoniques
CA539700A (fr) Systemes telephoniques
CA546387A (fr) Systemes de telephone
CA546624A (fr) Systemes de telephone
CA535581A (fr) Systemes de telephone a intercommunication
CA537813A (fr) Systemes de telephone d'intercommunication
CA546503A (fr) Systemes de telecommunication en deux sens
CA548744A (fr) Systemes de telephone automatique
CA546386A (fr) Systeme de telephone electronique
CA543973A (fr) Systeme de telephone automatique
CA522215A (fr) Systemes d'intercommunication par telephone
CA527080A (fr) Systeme de reponse pour telephone
AU221000B2 (en) Improvements in telephone systems
AU215819B2 (en) Improvements in telephone systems
AU216847B2 (en) Improvements in telephone systems
AU217337B2 (en) Improvements in telephone systems
AU219945B2 (en) Improvements in telephone systems
AU214701B2 (en) Improvements in telephone systems
CA541074A (fr) Structure de tabulateur de telephone
CA540295A (fr) Systeme de poste payant de telephone
CA550763A (fr) Tabulateurs de telephone
CA545180A (fr) Microphones
AU222606B2 (en) Improvements relating to telephone systems