NL21660C - - Google Patents

Info

Publication number
NL21660C
NL21660C NL21660DA NL21660C NL 21660 C NL21660 C NL 21660C NL 21660D A NL21660D A NL 21660DA NL 21660 C NL21660 C NL 21660C
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 NL21660C publication Critical patent/NL21660C/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
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/12—Non-planar diaphragms or cones

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
NL21660D 1926-02-24 NL21660C (enrdf_load_stackoverflow)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US90297A US1678833A (en) 1926-02-24 1926-02-24 Acoustic device

Publications (1)

Publication Number Publication Date
NL21660C true NL21660C (enrdf_load_stackoverflow)

Family

ID=22222163

Family Applications (1)

Application Number Title Priority Date Filing Date
NL21660D NL21660C (enrdf_load_stackoverflow) 1926-02-24

Country Status (4)

Country Link
US (1) US1678833A (enrdf_load_stackoverflow)
FR (1) FR626679A (enrdf_load_stackoverflow)
GB (1) GB266675A (enrdf_load_stackoverflow)
NL (1) NL21660C (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
FR626679A (fr) 1927-09-16
US1678833A (en) 1928-07-31
GB266675A (en) 1928-03-02

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