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FR759861A - Portable ear protection device for receiving telephone calls - Google Patents

Portable ear protection device for receiving telephone calls

Info

Publication number
FR759861A
FR759861A FR759861DA FR759861A FR 759861 A FR759861 A FR 759861A FR 759861D A FR759861D A FR 759861DA FR 759861 A FR759861 A FR 759861A
Authority
FR
France
Prior art keywords
protection device
telephone calls
receiving telephone
ear protection
portable ear
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
Clet Morino
Lazare-Pierre-Xavier Jeannet
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 FR759861A publication Critical patent/FR759861A/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

Landscapes

  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR759861D 1932-11-09 1932-11-09 Portable ear protection device for receiving telephone calls Expired FR759861A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR759861T 1932-11-09

Publications (1)

Publication Number Publication Date
FR759861A true FR759861A (en) 1934-02-13

Family

ID=9167484

Family Applications (1)

Application Number Title Priority Date Filing Date
FR759861D Expired FR759861A (en) 1932-11-09 1932-11-09 Portable ear protection device for receiving telephone calls

Country Status (1)

Country Link
FR (1) FR759861A (en)

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