BE396307A - - Google Patents

Info

Publication number
BE396307A
BE396307A BE396307DA BE396307A BE 396307 A BE396307 A BE 396307A BE 396307D A BE396307D A BE 396307DA BE 396307 A BE396307 A BE 396307A
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 BE396307A publication Critical patent/BE396307A/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)
BE396307D 1931-11-07 BE396307A (enrdf_load_stackoverflow)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR42126T 1931-11-07

Publications (1)

Publication Number Publication Date
BE396307A true BE396307A (enrdf_load_stackoverflow)

Family

ID=8678216

Family Applications (1)

Application Number Title Priority Date Filing Date
BE396307D BE396307A (enrdf_load_stackoverflow) 1931-11-07

Country Status (2)

Country Link
BE (1) BE396307A (enrdf_load_stackoverflow)
FR (2) FR737931A (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
FR737931A (fr) 1932-12-19
FR42126E (fr) 1933-05-31

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