TREA

Koji Matsumoto

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  • Yamagata, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Diaphragm and speaker
    • Patent number 7,706,564
    • Issue date Apr 27, 2010
    • Pioneer Corporation
    • Satoshi Hachiya
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Diaphragm for speaker and manufacturing method thereof
    • Patent number 7,601,763
    • Issue date Oct 13, 2009
    • Pioneer Corporation
    • Satoshi Hachiya
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    Speaker diaphragm
    • Patent number 6,929,092
    • Issue date Aug 16, 2005
    • Pioneer Corporation
    • Yasuhisa Abe
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Electrically conductive damper device for speaker
    • Patent number 6,814,181
    • Issue date Nov 9, 2004
    • Pioneer Corporation
    • Yasuhisa Abe
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Speaker apparatus
    • Patent number 6,590,990
    • Issue date Jul 8, 2003
    • Pioneer Corporation
    • Yasuhisa Abe
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

  • Information Patent Application

    REPULSION-TYPE MAGNETIC CIRCUIT AND SPEAKER DEVICE
    • Publication number 20100128891
    • Publication date May 27, 2010
    • Pioneer Corporation
    • Hayami Kondo
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    SPEAKER GRILLE AND SPEAKER DEVICE
    • Publication number 20070098206
    • Publication date May 3, 2007
    • Pioneer Corporation
    • Tomiaki ANDO
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    Diaphragm for speaker and manufacturing method thereof
    • Publication number 20070072953
    • Publication date Mar 29, 2007
    • Satoshi Hachiya
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Application

    Speaker apparatus, method of manufacturing the same, and frame for...
    • Publication number 20070030994
    • Publication date Feb 8, 2007
    • Pioneer Corporation and Tohoku Pioneer Corporation
    • Tomiaki Ando
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    Diaphragm and speaker
    • Publication number 20060193488
    • Publication date Aug 31, 2006
    • Pioneer Corporation
    • Satoshi Hachiya
    • D03 - WEAVING
  • Information Patent Application

    Bobbin integrated type magnesium diaphragm, manufacturing method th...
    • Publication number 20050257999
    • Publication date Nov 24, 2005
    • Pioneer Corporation
    • Hiroyuki Tomiyama
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    Speaker-use diaphragm and speaker
    • Publication number 20050232457
    • Publication date Oct 20, 2005
    • PIONEER CORPORATION
    • Satoshi Hachiya
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    Electrically conductive damper device for speaker
    • Publication number 20020112914
    • Publication date Aug 22, 2002
    • PIONEER CORPORATION
    • Yasuhisa Abe
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    Speaker apparatus
    • Publication number 20020067843
    • Publication date Jun 6, 2002
    • Pioneer Corporation and Tohoku Pioneer Corporation
    • Yasuhisa Abe
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    Speaker apparatus
    • Publication number 20020057818
    • Publication date May 16, 2002
    • Yasuhisa Abe
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    Speaker diaphragm
    • Publication number 20020046900
    • Publication date Apr 25, 2002
    • Pioneer Corporation and Tohoku Pioneer Corporation
    • Yasuhisa Abe
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE