FR699990A - Ear sanitary protector, avoiding contact with telephone and other headphones - Google Patents

Ear sanitary protector, avoiding contact with telephone and other headphones

Info

Publication number
FR699990A
FR699990A FR699990DA FR699990A FR 699990 A FR699990 A FR 699990A FR 699990D A FR699990D A FR 699990DA FR 699990 A FR699990 A FR 699990A
Authority
FR
France
Prior art keywords
headphones
ear
telephone
avoiding contact
sanitary protector
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
Rene-Leon-Jacques-La De Ville
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 FR699990A publication Critical patent/FR699990A/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
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/12—Sanitary or hygienic devices for mouthpieces or earpieces, e.g. for protecting against infection
FR699990D 1929-11-13 1929-11-13 Ear sanitary protector, avoiding contact with telephone and other headphones Expired FR699990A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR699990T 1929-11-13

Publications (1)

Publication Number Publication Date
FR699990A true FR699990A (en) 1931-02-23

Family

ID=9048499

Family Applications (1)

Application Number Title Priority Date Filing Date
FR699990D Expired FR699990A (en) 1929-11-13 1929-11-13 Ear sanitary protector, avoiding contact with telephone and other headphones

Country Status (1)

Country Link
FR (1) FR699990A (en)

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