TREA

Short circuited voice coils driven by induction

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Industry

  • CPC
  • H04R2209/043
This industry / category may be too specific. Please go to a parent level for more data

Parent Industries

HELECTRICITY H04Electric communication H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS DEAF-AID SETS PUBLIC ADDRESS SYSTEMS H04R2209/00Details of transducers of the moving-coil, moving-strip, or moving-wire type covered by H04R9/00 but not provided for in any of its subgroups

Current Industry

H04R2209/043Short circuited voice coils driven by induction
Industries

Patents Grantslast 30 patents

  • Information Patent Grant

    Acoustic loudspeaker
    • Patent number 8,917,898
    • Issue date Dec 23, 2014
    • FOCAL JMLAB
    • Daniel Emonts
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Speaker apparatus
    • Patent number 7,016,515
    • Issue date Mar 21, 2006
    • Sony Corporation
    • Yoshio Ohashi
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Speaker apparatus
    • Patent number 6,904,158
    • Issue date Jun 7, 2005
    • Sony Corporation
    • Yoshio Ohashi
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Speaker device
    • Patent number 6,570,995
    • Issue date May 27, 2003
    • Sony Corporation
    • Yoshio Ohashi
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Speaker device
    • Patent number 6,359,996
    • Issue date Mar 19, 2002
    • Sony Corporation
    • Yoshio Ohashi
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Acoustic transducer
    • Patent number 6,175,637
    • Issue date Jan 16, 2001
    • Sony Corporation
    • Masao Fujihira
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Speaker apparatus and sound reproduction system employing same
    • Patent number 6,160,894
    • Issue date Dec 12, 2000
    • Sony Corporation
    • Jun Kishigami
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Speaker apparatus
    • Patent number 5,909,496
    • Issue date Jun 1, 1999
    • Sony Corporation
    • Jun Kishigami
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Inductive braking in a dual coil speaker driver unit
    • Patent number 5,828,767
    • Issue date Oct 27, 1998
    • JBL Inc.
    • Douglas J. Button
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Loudspeaker
    • Patent number 5,602,930
    • Issue date Feb 11, 1997
    • Harman-Motive Limited
    • Roger N. Walton
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Induction speaker
    • Patent number 5,062,140
    • Issue date Oct 29, 1991
    • Sony Corporation
    • Kiyofumi Inanaga
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Electro acoustic transducer and loudspeaker
    • Patent number 4,965,839
    • Issue date Oct 23, 1990
    • Boaz Elieli
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1923831
    • Patent number 1,923,831
    • Issue date Aug 22, 1933
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

  • Information Patent Application

    DUAL AXIAL MAGNETIC FLUX INDUCTION SPEAKER
    • Publication number 20230164492
    • Publication date May 25, 2023
    • Hector QUERRY
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Application

    ACOUSTIC LOUDSPEAKER
    • Publication number 20130148841
    • Publication date Jun 13, 2013
    • FOCAL JMLAB
    • Daniel Emonts
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    Pollable transformer isolated speaker system and method
    • Publication number 20040213422
    • Publication date Oct 28, 2004
    • EDWARD SIGNALING TECHNOLOGY, INC.
    • Angelo S. Arcaria
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    Speaker apparatus
    • Publication number 20040184622
    • Publication date Sep 23, 2004
    • Sony Corporation
    • Yoshio Ohashi
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    Speaker device
    • Publication number 20020118857
    • Publication date Aug 29, 2002
    • Yoshio Ohashi
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE