BE572796A - - Google Patents

Info

Publication number
BE572796A
BE572796A BE572796DA BE572796A BE 572796 A BE572796 A BE 572796A BE 572796D A BE572796D A BE 572796DA BE 572796 A BE572796 A BE 572796A
Authority
BE
Belgium
Application number
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.)
Publication of BE572796A publication Critical patent/BE572796A/xx

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)
BE572796D 1957-11-07 BE572796A (US06623731-20030923-C00008.png)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1219241X 1957-11-07

Publications (1)

Publication Number Publication Date
BE572796A true BE572796A (US06623731-20030923-C00008.png)

Family

ID=10883511

Family Applications (1)

Application Number Title Priority Date Filing Date
BE572796D BE572796A (US06623731-20030923-C00008.png) 1957-11-07

Country Status (2)

Country Link
BE (1) BE572796A (US06623731-20030923-C00008.png)
FR (1) FR1219241A (US06623731-20030923-C00008.png)

Also Published As

Publication number Publication date
FR1219241A (fr) 1960-05-16

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