FR29698E - Loudspeaker telephone - Google Patents

Loudspeaker telephone

Info

Publication number
FR29698E
FR29698E FR29698DA FR29698E FR 29698 E FR29698 E FR 29698E FR 29698D A FR29698D A FR 29698DA FR 29698 E FR29698 E FR 29698E
Authority
FR
France
Prior art keywords
loudspeaker telephone
loudspeaker
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
Other languages
French (fr)
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.)
Societe des Etablissements Gaumont
Original Assignee
Societe des Etablissements Gaumont
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 by Societe des Etablissements Gaumont filed Critical Societe des Etablissements Gaumont
Application granted granted Critical
Publication of FR29698E publication Critical patent/FR29698E/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
    • H04M1/6033—Substation equipment, e.g. for use by subscribers including speech amplifiers for providing handsfree use or a loudspeaker mode in telephone sets
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/04—Supports for telephone transmitters or receivers

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
FR29698D 1923-01-27 1924-04-28 Loudspeaker telephone Expired FR29698E (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE571848X 1923-01-27

Publications (1)

Publication Number Publication Date
FR29698E true FR29698E (en) 1925-09-21

Family

ID=3873145

Family Applications (2)

Application Number Title Priority Date Filing Date
FR571848D Expired FR571848A (en) 1923-01-27 1923-10-11 Loudspeaker telephone
FR29698D Expired FR29698E (en) 1923-01-27 1924-04-28 Loudspeaker telephone

Family Applications Before (1)

Application Number Title Priority Date Filing Date
FR571848D Expired FR571848A (en) 1923-01-27 1923-10-11 Loudspeaker telephone

Country Status (1)

Country Link
FR (2) FR571848A (en)

Also Published As

Publication number Publication date
FR571848A (en) 1924-05-23

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