FR374128A - Hygienic ear isolator - Google Patents

Hygienic ear isolator

Info

Publication number
FR374128A
FR374128A FR374128DA FR374128A FR 374128 A FR374128 A FR 374128A FR 374128D A FR374128D A FR 374128DA FR 374128 A FR374128 A FR 374128A
Authority
FR
France
Prior art keywords
hygienic
isolator
ear
hygienic ear
ear isolator
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
Paul-Alphonse-Auguste Ducatel
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 ALPHONSE AUGUSTE DUCATEL
Original Assignee
PAUL ALPHONSE AUGUSTE DUCATEL
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 ALPHONSE AUGUSTE DUCATEL filed Critical PAUL ALPHONSE AUGUSTE DUCATEL
Application granted granted Critical
Publication of FR374128A publication Critical patent/FR374128A/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)
FR374128D 1907-02-01 1907-02-01 Hygienic ear isolator Expired FR374128A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR374128T 1907-02-01

Publications (1)

Publication Number Publication Date
FR374128A true FR374128A (en) 1907-06-05

Family

ID=1420795

Family Applications (1)

Application Number Title Priority Date Filing Date
FR374128D Expired FR374128A (en) 1907-02-01 1907-02-01 Hygienic ear isolator

Country Status (1)

Country Link
FR (1) FR374128A (en)

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