FR444538A - Loudspeaker telephone for aerial locomotion - Google Patents

Loudspeaker telephone for aerial locomotion

Info

Publication number
FR444538A
FR444538A FR444538DA FR444538A FR 444538 A FR444538 A FR 444538A FR 444538D A FR444538D A FR 444538DA FR 444538 A FR444538 A FR 444538A
Authority
FR
France
Prior art keywords
loudspeaker telephone
aerial locomotion
locomotion
aerial
loudspeaker
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)
Inventor
Adolphe Ledouble
Charles Ledouble
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.)
ADOLPHE LEDOUBLE
CHARLES LEDOUBLE
Original Assignee
ADOLPHE LEDOUBLE
CHARLES LEDOUBLE
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 ADOLPHE LEDOUBLE, CHARLES LEDOUBLE filed Critical ADOLPHE LEDOUBLE
Application granted granted Critical
Publication of FR444538A publication Critical patent/FR444538A/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
    • H04M1/02—Constructional features of telephone sets
    • H04M1/04—Supports for telephone transmitters or receivers
    • H04M1/05—Supports for telephone transmitters or receivers specially adapted for use on head, throat or breast

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
FR444538D 1912-06-03 1912-06-03 Loudspeaker telephone for aerial locomotion Expired FR444538A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR444538T 1912-06-03

Publications (1)

Publication Number Publication Date
FR444538A true FR444538A (en) 1912-10-19

Family

ID=1485508

Family Applications (1)

Application Number Title Priority Date Filing Date
FR444538D Expired FR444538A (en) 1912-06-03 1912-06-03 Loudspeaker telephone for aerial locomotion

Country Status (1)

Country Link
FR (1) FR444538A (en)

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