FR769416A - Device for disinfection of microphones - Google Patents

Device for disinfection of microphones

Info

Publication number
FR769416A
FR769416A FR769416DA FR769416A FR 769416 A FR769416 A FR 769416A FR 769416D A FR769416D A FR 769416DA FR 769416 A FR769416 A FR 769416A
Authority
FR
France
Prior art keywords
microphones
disinfection
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
Joaquim D Oliveira Costa
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 FR769416A publication Critical patent/FR769416A/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)
  • Telephone Set Structure (AREA)
FR769416D 1934-02-01 1934-02-28 Device for disinfection of microphones Expired FR769416A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PT417431X 1934-02-01

Publications (1)

Publication Number Publication Date
FR769416A true FR769416A (en) 1934-08-25

Family

ID=20081617

Family Applications (1)

Application Number Title Priority Date Filing Date
FR769416D Expired FR769416A (en) 1934-02-01 1934-02-28 Device for disinfection of microphones

Country Status (3)

Country Link
BE (1) BE401688A (en)
FR (1) FR769416A (en)
GB (1) GB417431A (en)

Also Published As

Publication number Publication date
BE401688A (en)
GB417431A (en) 1934-10-04

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