FR466926A - Perfectionnements aux microtéléphones portatifs pour sourds - Google Patents

Perfectionnements aux microtéléphones portatifs pour sourds

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
English (en)
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/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Electric hearing aids
    • H04R25/04—Electric hearing aids 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 Perfectionnements aux microtéléphones portatifs pour sourds Expired FR466926A (fr)

Applications Claiming Priority (1)

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

Publications (1)

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

Family

ID=1505640

Family Applications (1)

Application Number Title Priority Date Filing Date
FR466926D Expired FR466926A (fr) 1913-12-31 1913-12-31 Perfectionnements aux microtéléphones portatifs pour sourds

Country Status (1)

Country Link
FR (1) FR466926A (fr)

Similar Documents

Publication Publication Date Title
FR466926A (fr) Perfectionnements aux microtéléphones portatifs pour sourds
FR462307A (fr) Perfectionnements aux tire-bouchons
FR453795A (fr) Perfectionnements aux rotissoires
GB191323225A (en) An Apparatus for use in the Teaching of Music.
FR16865E (fr) Perfectionnement aux carrosseries
FR472201A (fr) Perfectionnements aux métiers verticaux
FR455605A (fr) Perfectionnements aux biberons
FR468114A (fr) Pare-balles portatif
FR466248A (fr) Perfectionnement aux robinets chirurgicaux
FR458290A (fr) Perfectionnement aux bouchages métalliques
FR454163A (fr) Perfectionnement aux machines parlantes
FR464401A (fr) Vibro-masseur
FR469044A (fr) Perfectionnements aux bouteilles
CH64428A (de) Ausgußstein
FR460622A (fr) Perfectionnements aux aéro-hydroplanes
FR456936A (fr) Perfectionnements aux bluteries
FR474621A (fr) Perfectionnements aux multiplans
CA155881A (fr) Dispositif a calculer
FR19402E (fr) Perfectionnement aux trolleys
FR472708A (fr) Perfectionnement aux trolleys
FR461733A (fr) Projecteur portatif
FR469395A (fr) Perfectionnement aux cables téléphoniques
CA153599A (fr) Elevateur transportable
FR470661A (fr) Perfectionnements aux chaires
FR476713A (fr) Piscine-bains pour la natation