FR815434A - Installation de transmission acoustique - Google Patents

Installation de transmission acoustique

Info

Publication number
FR815434A
FR815434A FR815434DA FR815434A FR 815434 A FR815434 A FR 815434A FR 815434D A FR815434D A FR 815434DA FR 815434 A FR815434 A FR 815434A
Authority
FR
France
Prior art keywords
sound transmission
transmission installation
installation
sound
transmission
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
Other languages
English (en)
Inventor
Eppler Jean
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Application granted granted Critical
Publication of FR815434A publication Critical patent/FR815434A/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/001—Two-way communication systems between a limited number of parties
FR815434D 1936-03-23 1936-03-23 Installation de transmission acoustique Expired FR815434A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR815434T 1936-03-23

Publications (1)

Publication Number Publication Date
FR815434A true FR815434A (fr) 1937-07-12

Family

ID=9267247

Family Applications (2)

Application Number Title Priority Date Filing Date
FR788456D Expired FR788456A (fr) 1936-03-23 1935-04-01 Dispositif téléphonique applicable aux amplificateurs à fréquence acoustique
FR815434D Expired FR815434A (fr) 1936-03-23 1936-03-23 Installation de transmission acoustique

Family Applications Before (1)

Application Number Title Priority Date Filing Date
FR788456D Expired FR788456A (fr) 1936-03-23 1935-04-01 Dispositif téléphonique applicable aux amplificateurs à fréquence acoustique

Country Status (3)

Country Link
BE (1) BE414653A (fr)
FR (2) FR788456A (fr)
GB (1) GB477967A (fr)

Also Published As

Publication number Publication date
BE414653A (fr)
FR788456A (fr) 1935-10-10
GB477967A (en) 1938-01-06

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