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Yoshizumi Ohta

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Patents Grantslast 30 patents

  • Information Patent Grant

    Panel-typed loud speaker and an exciter therefor
    • Patent number 7,764,804
    • Issue date Jul 27, 2010
    • Citizen Electronics Co., Ltd.
    • Yoshizumi Ohta
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Case for containing electrical instrument
    • Patent number 7,181,040
    • Issue date Feb 20, 2007
    • Citizen Electronics Co., Ltd.
    • Yoshizumi Ohta
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Electrical acoustic converter
    • Patent number 7,010,142
    • Issue date Mar 7, 2006
    • Citizen Electronics Co., Ltd.
    • Atsushi Kuwabara
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Speaker for an electronic instrument
    • Patent number 6,845,168
    • Issue date Jan 18, 2005
    • Citizen Electronics Co., Ltd.
    • Atsushi Kuwabara
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Speaker for an electronic instrument
    • Patent number 6,795,563
    • Issue date Sep 21, 2004
    • Citizen Electronics Co., Ltd.
    • Yoshizumi Ohta
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Speaker
    • Patent number 6,751,332
    • Issue date Jun 15, 2004
    • Citizen Electronics Co., Ltd.
    • Takashi Kobayashi
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Microspeaker
    • Patent number 6,690,809
    • Issue date Feb 10, 2004
    • Citizen Electronics Co., Ltd.
    • Kazumi Miyamoto
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Connecting device for connecting a sound producing device to an ele...
    • Patent number 6,504,940
    • Issue date Jan 7, 2003
    • Citizen Electronics Co., Ltd.
    • Hajime Omata
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    Electromagnetic sound generator
    • Patent number 6,476,710
    • Issue date Nov 5, 2002
    • Citizen Electronics Co., Ltd.
    • Shinichi Togawa
    • G10 - MUSICAL INSTRUMENTS ACOUSTICS
  • Information Patent Grant

    Microspeaker
    • Patent number 6,400,825
    • Issue date Jun 4, 2002
    • Citizen Electronics Co., Ltd.
    • Kazumi Miyamoto
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Loudspeaker with a socket
    • Patent number D446785
    • Issue date Aug 21, 2001
    • Citizen Electronics Co., Ltd.
    • Yoshizumi Ohta
    • D14 - Recording, communication, or information retrieval equipment
  • Information Patent Grant

    Electromagnetic sound generating body
    • Patent number 6,208,238
    • Issue date Mar 27, 2001
    • Citizen Electronics Co., Ltd.
    • Yoshizumi Ohta
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

  • Information Patent Application

    Panel-typed loud speaker and an exciter therefor
    • Publication number 20070053531
    • Publication date Mar 8, 2007
    • CITIZEN ELECTRONICS CO., LTD.
    • Yoshizumi Ohta
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    Speaker and method for manufacturing the speaker
    • Publication number 20060177092
    • Publication date Aug 10, 2006
    • Yoshizumi Ohta
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    Electro-dynamic exciter
    • Publication number 20060072248
    • Publication date Apr 6, 2006
    • CITIZEN ELECTRONICS CO., LTD.
    • Shigehisa Watanabe
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    Case for containing electrical instrument
    • Publication number 20040170298
    • Publication date Sep 2, 2004
    • Citizen Electronics Co., Ltd.
    • Yoshizumi Ohta
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    Electrical acoustic converter
    • Publication number 20040105564
    • Publication date Jun 3, 2004
    • Citizen Electronics Co., Ltd.
    • Atsushi Kuwabara
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    Speaker for an electronic instrument
    • Publication number 20030194105
    • Publication date Oct 16, 2003
    • CITIZEN ELECTRONICS CO., LTD.
    • Atsushi Kuwabara
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    Speaker
    • Publication number 20020064293
    • Publication date May 30, 2002
    • CITIZEN ELECTRONICS CO., LTD.
    • Takashi Kobayashi
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    Microspeaker
    • Publication number 20020054688
    • Publication date May 9, 2002
    • CITIZEN ELECTRONICS CO., INC.
    • Kazumi Miyamoto
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    MICROSPEAKER
    • Publication number 20020054691
    • Publication date May 9, 2002
    • CITIZEN ELECTRONICS CO., LTD.
    • Kazumi Miyamoto
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    Electromagnetic sound generator
    • Publication number 20010033224
    • Publication date Oct 25, 2001
    • CITIZEN ELECTRONICS CO., LTD.
    • Shinichi Togawa
    • G10 - MUSICAL INSTRUMENTS ACOUSTICS
  • Information Patent Application

    Speaker for an electronic instrument
    • Publication number 20010033672
    • Publication date Oct 25, 2001
    • CITIZEN ELECTRONICS CO., LTD.
    • Yoshizumi Ohta
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    Connecting device for connecting a sound producing device to an ele...
    • Publication number 20010004398
    • Publication date Jun 21, 2001
    • Hajime Omata
    • H01 - BASIC ELECTRIC ELEMENTS