FR478363A - Perfectionnements aux monophones sanitaires - Google Patents

Perfectionnements aux monophones sanitaires

Info

Publication number
FR478363A
FR478363A FR478363A FR478363DA FR478363A FR 478363 A FR478363 A FR 478363A FR 478363 A FR478363 A FR 478363A FR 478363D A FR478363D A FR 478363DA FR 478363 A FR478363 A FR 478363A
Authority
FR
France
Prior art keywords
monophones
sanitary
sanitary monophones
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
FR478363A
Other languages
English (en)
Inventor
Monroe Jenkins
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of FR478363A publication Critical patent/FR478363A/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; 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)
  • Apparatus For Disinfection Or Sterilisation (AREA)
FR478363A 1915-03-02 1915-04-13 Perfectionnements aux monophones sanitaires Expired FR478363A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB191503329T 1915-03-02

Publications (1)

Publication Number Publication Date
FR478363A true FR478363A (fr) 1915-12-08

Family

ID=32649206

Family Applications (1)

Application Number Title Priority Date Filing Date
FR478363A Expired FR478363A (fr) 1915-03-02 1915-04-13 Perfectionnements aux monophones sanitaires

Country Status (2)

Country Link
FR (1) FR478363A (fr)
GB (1) GB191503329A (fr)

Also Published As

Publication number Publication date
GB191503329A (en) 1916-03-02

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