NL25231C - - Google Patents

Info

Publication number
NL25231C
NL25231C NL25231DA NL25231C NL 25231 C NL25231 C NL 25231C NL 25231D A NL25231D A NL 25231DA NL 25231 C NL25231 C NL 25231C
Authority
NL
Netherlands
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 NL25231C publication Critical patent/NL25231C/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
    • H04R21/00—Variable-resistance transducers
    • H04R21/02—Microphones
    • H04R21/026—Microphones in which the sound is perpendicular to the current crossing the transducer material

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
NL25231D 1928-04-27 NL25231C (enrdf_load_stackoverflow)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL310513X 1928-04-27

Publications (1)

Publication Number Publication Date
NL25231C true NL25231C (enrdf_load_stackoverflow)

Family

ID=19783616

Family Applications (1)

Application Number Title Priority Date Filing Date
NL25231D NL25231C (enrdf_load_stackoverflow) 1928-04-27

Country Status (3)

Country Link
FR (1) FR672159A (enrdf_load_stackoverflow)
GB (1) GB310513A (enrdf_load_stackoverflow)
NL (1) NL25231C (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
GB310513A (en) 1930-02-27
FR672159A (fr) 1929-12-24

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