TREA

by pressurised air

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  • CPC
  • H04R9/042
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Parent Industries

HELECTRICITY H04Electric communication H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS DEAF-AID SETS PUBLIC ADDRESS SYSTEMS H04R9/00Transducers of moving-coil, moving-strip, or moving-wire type

Current Industry

H04R9/042by pressurised air
Industries

Patents Grantslast 30 patents

  • Information Patent Grant

    Vented loudspeaker
    • Patent number 11,284,186
    • Issue date Mar 22, 2022
    • JL Audio, Inc.
    • Lucio Proni
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Sound producing device
    • Patent number 10,863,280
    • Issue date Dec 8, 2020
    • xMEMS Labs, Inc.
    • Jemm Yue Liang
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Sound producing device
    • Patent number 10,779,088
    • Issue date Sep 15, 2020
    • xMEMS Labs, Inc.
    • Jemm Yue Liang
    • H03 - BASIC ELECTRONIC CIRCUITRY
  • Information Patent Grant

    Speaker apparatus
    • Patent number 7,936,896
    • Issue date May 3, 2011
    • Pioneer Corporation
    • Minoru Horigome
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Speaker apparatus
    • Patent number 7,515,728
    • Issue date Apr 7, 2009
    • Pioneer Corporation
    • Hiroyuki Kobayashi
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Acoustic device with floating vibrating means
    • Patent number 4,259,550
    • Issue date Mar 31, 1981
    • Yoshiro Nakamatsu
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Loudspeaker with improved voice coil support
    • Patent number 4,165,448
    • Issue date Aug 21, 1979
    • Haruo Ishikawa
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    3909557
    • Patent number 3,909,557
    • Issue date Sep 30, 1975
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    3870833
    • Patent number 3,870,833
    • Issue date Mar 11, 1975
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    3828144
    • Patent number 3,828,144
    • Issue date Aug 6, 1974
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    3819876
    • Patent number 3,819,876
    • Issue date Jun 25, 1974
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    3804994
    • Patent number 3,804,994
    • Issue date Apr 16, 1974
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1925659
    • Patent number 1,925,659
    • Issue date Sep 5, 1933
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1774465
    • Patent number 1,774,465
    • Issue date Aug 26, 1930
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1748858
    • Patent number 1,748,858
    • Issue date Feb 25, 1930
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1721023
    • Patent number 1,721,023
    • Issue date Jul 16, 1929
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1715057
    • Patent number 1,715,057
    • Issue date May 28, 1929
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1712920
    • Patent number 1,712,920
    • Issue date May 14, 1929
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1707617
    • Patent number 1,707,617
    • Issue date Apr 2, 1929
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

  • Information Patent Application

    Sound Producing Device
    • Publication number 20200288248
    • Publication date Sep 10, 2020
    • xMEMS Labs, Inc.
    • Jemm Yue Liang
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    VENTED LOUDSPEAKER
    • Publication number 20200068291
    • Publication date Feb 27, 2020
    • JL Audio, Inc.
    • Lucio Proni
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    Speaker apparatus
    • Publication number 20070116322
    • Publication date May 24, 2007
    • PIONEER CORPORATION
    • Minoru Horigome
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    Speaker apparatus
    • Publication number 20050141746
    • Publication date Jun 30, 2005
    • PIONEER CORPORATION
    • Hiroyuki Kobayashi
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE