FR667442A - Improvements in hearing aids for the deaf - Google Patents

Improvements in hearing aids for the deaf

Info

Publication number
FR667442A
FR667442A FR667442DA FR667442A FR 667442 A FR667442 A FR 667442A FR 667442D A FR667442D A FR 667442DA FR 667442 A FR667442 A FR 667442A
Authority
FR
France
Prior art keywords
deaf
hearing aids
hearing
aids
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.)
Porges SA
Original Assignee
Porges SA
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 Porges SA filed Critical Porges SA
Application granted granted Critical
Publication of FR667442A publication Critical patent/FR667442A/en
Expired legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F11/00—Methods or devices for treatment of the ears or hearing sense; Non-electric hearing aids; Methods or devices for enabling ear patients to achieve auditory perception through physiological senses other than hearing sense; Protective devices for the ears, carried on the body or in the hand
    • A61F11/30—Non-electric hearing aids, e.g. ear trumpets, sound amplifiers or ear-shells
FR667442D 1929-01-15 1929-01-15 Improvements in hearing aids for the deaf Expired FR667442A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR667442T 1929-01-15

Publications (1)

Publication Number Publication Date
FR667442A true FR667442A (en) 1929-10-16

Family

ID=9014415

Family Applications (1)

Application Number Title Priority Date Filing Date
FR667442D Expired FR667442A (en) 1929-01-15 1929-01-15 Improvements in hearing aids for the deaf

Country Status (1)

Country Link
FR (1) FR667442A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4546215A (en) * 1983-10-07 1985-10-08 Ferraro Michael V Detachable earmuffs for headsets

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4546215A (en) * 1983-10-07 1985-10-08 Ferraro Michael V Detachable earmuffs for headsets

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