FR908793A - Listening device, in particular for checking conduits traversed by current and machines - Google Patents

Listening device, in particular for checking conduits traversed by current and machines

Info

Publication number
FR908793A
FR908793A FR908793DA FR908793A FR 908793 A FR908793 A FR 908793A FR 908793D A FR908793D A FR 908793DA FR 908793 A FR908793 A FR 908793A
Authority
FR
France
Prior art keywords
checking
machines
current
listening device
traversed
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
Karl Kellenberger
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 filed Critical
Application granted granted Critical
Publication of FR908793A publication Critical patent/FR908793A/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
FR908793D 1943-11-23 1945-01-16 Listening device, in particular for checking conduits traversed by current and machines Expired FR908793A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH908793X 1943-11-23

Publications (1)

Publication Number Publication Date
FR908793A true FR908793A (en) 1946-04-18

Family

ID=4547097

Family Applications (1)

Application Number Title Priority Date Filing Date
FR908793D Expired FR908793A (en) 1943-11-23 1945-01-16 Listening device, in particular for checking conduits traversed by current and machines

Country Status (1)

Country Link
FR (1) FR908793A (en)

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