BE401688A - - Google Patents

Info

Publication number
BE401688A
BE401688A BE401688DA BE401688A BE 401688 A BE401688 A BE 401688A BE 401688D A BE401688D A BE 401688DA BE 401688 A BE401688 A BE 401688A
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 BE401688A publication Critical patent/BE401688A/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)
  • Telephone Set Structure (AREA)
BE401688D 1934-02-01 BE401688A (enrdf_load_html_response)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
BE401688A true BE401688A (enrdf_load_html_response)

Family

ID=20081617

Family Applications (1)

Application Number Title Priority Date Filing Date
BE401688D BE401688A (enrdf_load_html_response) 1934-02-01

Country Status (3)

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

Also Published As

Publication number Publication date
FR769416A (fr) 1934-08-25
GB417431A (en) 1934-10-04

Similar Documents

Publication Publication Date Title
BE401688A (enrdf_load_html_response)
BE350814A (enrdf_load_html_response)
BE355850A (enrdf_load_html_response)
BE384004A (enrdf_load_html_response)
BE400763A (enrdf_load_html_response)
BE401025A (enrdf_load_html_response)
BE401210A (enrdf_load_html_response)
BE401211A (enrdf_load_html_response)
BE401222A (enrdf_load_html_response)
BE401226A (enrdf_load_html_response)
BE401237A (enrdf_load_html_response)
BE401496A (enrdf_load_html_response)
BE401891A (enrdf_load_html_response)
BE401946A (enrdf_load_html_response)
BE402205A (enrdf_load_html_response)
BE402207A (enrdf_load_html_response)
BE402225A (enrdf_load_html_response)
BE402346A (enrdf_load_html_response)
BE402391A (enrdf_load_html_response)
BE402442A (enrdf_load_html_response)
BE402503A (enrdf_load_html_response)
BE402553A (enrdf_load_html_response)
BE402584A (enrdf_load_html_response)
BE402626A (enrdf_load_html_response)
BE402683A (enrdf_load_html_response)