FR466926A - Developments in portable microtelephones for the deaf - Google Patents

Developments in portable microtelephones for the deaf

Info

Publication number
FR466926A
FR466926A FR466926DA FR466926A FR 466926 A FR466926 A FR 466926A FR 466926D A FR466926D A FR 466926DA FR 466926 A FR466926 A FR 466926A
Authority
FR
France
Prior art keywords
microtelephones
deaf
developments
portable
portable microtelephones
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
Paul Franck-Valery
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.)
PAUL FRANCK VALERY
Original Assignee
PAUL FRANCK VALERY
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 PAUL FRANCK VALERY filed Critical PAUL FRANCK VALERY
Application granted granted Critical
Publication of FR466926A publication Critical patent/FR466926A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
    • H04R25/04—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception comprising pocket amplifiers

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Neurosurgery (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR466926D 1913-12-31 1913-12-31 Developments in portable microtelephones for the deaf Expired FR466926A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR466926T 1913-12-31

Publications (1)

Publication Number Publication Date
FR466926A true FR466926A (en) 1914-05-28

Family

ID=1505640

Family Applications (1)

Application Number Title Priority Date Filing Date
FR466926D Expired FR466926A (en) 1913-12-31 1913-12-31 Developments in portable microtelephones for the deaf

Country Status (1)

Country Link
FR (1) FR466926A (en)

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