TREA

with a fluid as resistance material

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  • H04R21/028
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HELECTRICITY H04Electric communication H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS DEAF-AID SETS PUBLIC ADDRESS SYSTEMS H04R21/00Variable-resistance transducers

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H04R21/028with a fluid as resistance material
Industries

Patents Grantslast 30 patents

  • Information Patent Grant

    Hydraulic microphone
    • Patent number 9,591,413
    • Issue date Mar 7, 2017
    • Cochlear Limited
    • Scott Allen Miller
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Fluid coupled subwoofer acoustic enclosure system
    • Patent number 6,014,448
    • Issue date Jan 11, 2000
    • Sound Related Technologies
    • Noyal J. Alton
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Environmentally sealed acoustic transducer coupling
    • Patent number 5,729,508
    • Issue date Mar 17, 1998
    • Rosemount Aerospace Inc.
    • Anthony D. Baker
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2786898
    • Patent number 2,786,898
    • Issue date Mar 26, 1957
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2769038
    • Patent number 2,769,038
    • Issue date Oct 30, 1956
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2711446
    • Patent number 2,711,446
    • Issue date Jun 21, 1955
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2711447
    • Patent number 2,711,447
    • Issue date Jun 21, 1955
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2703822
    • Patent number 2,703,822
    • Issue date Mar 8, 1955
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2648726
    • Patent number 2,648,726
    • Issue date Aug 11, 1953
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2403696
    • Patent number 2,403,696
    • Issue date Jul 9, 1946
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2279815
    • Patent number 2,279,815
    • Issue date Apr 14, 1942
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1972578
    • Patent number 1,972,578
    • Issue date Sep 4, 1934
    • G01 - MEASURING TESTING
  • Information Patent Grant

    1809713
    • Patent number 1,809,713
    • Issue date Jun 9, 1931
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1757775
    • Patent number 1,757,775
    • Issue date May 6, 1930
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1738988
    • Patent number 1,738,988
    • Issue date Dec 10, 1929
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1686901
    • Patent number 1,686,901
    • Issue date Oct 9, 1928
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1650740
    • Patent number 1,650,740
    • Issue date Nov 29, 1927
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1496254
    • Patent number 1,496,254
    • Issue date Jun 3, 1924
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

  • Information Patent Application

    VIBRATION SENSOR
    • Publication number 20230362525
    • Publication date Nov 9, 2023
    • SHENZHEN SHOKZ CO., LTD.
    • Yongshuai YUAN
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    HYDRAULIC MICROPHONE
    • Publication number 20150126805
    • Publication date May 7, 2015
    • COCHLEAR LIMITED
    • Scott Allen MILLER
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE