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Katsumi Yamatogi

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  • Shinagawa-ku, Tokyo, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Headphone
    • Patent number D348465
    • Issue date Jul 5, 1994
    • Sony Corporation
    • Katsumi Yamatogi
    • D14 - Recording, communication, or information retrieval equipment
  • Information Patent Grant

    Headphone
    • Patent number D348466
    • Issue date Jul 5, 1994
    • Sony Corporation
    • Katsumi Yamatogi
    • D14 - Recording, communication, or information retrieval equipment
  • Information Patent Grant

    Headphone
    • Patent number D347434
    • Issue date May 31, 1994
    • Sony Corporation
    • Katsumi Yamatogi
    • D14 - Recording, communication, or information retrieval equipment
  • Information Patent Grant

    Headphone
    • Patent number D345163
    • Issue date Mar 15, 1994
    • Sony Corporation
    • Katsumi Yamatogi
    • D14 - Recording, communication, or information retrieval equipment
  • Information Patent Grant

    Headphone
    • Patent number D345162
    • Issue date Mar 15, 1994
    • Sony Corporation
    • Katsumi Yamatogi
    • D14 - Recording, communication, or information retrieval equipment
  • Information Patent Grant

    Headphone
    • Patent number D338010
    • Issue date Aug 3, 1993
    • Sony Corporation
    • Katsumi Yamatogi
    • D14 - Recording, communication, or information retrieval equipment
  • Information Patent Grant

    Infra-red ray transmission machine for cordless headphone
    • Patent number D337767
    • Issue date Jul 27, 1993
    • Sony Corporation
    • Takashi Sogabe
    • D14 - Recording, communication, or information retrieval equipment
  • Information Patent Grant

    Earphone case
    • Patent number D333560
    • Issue date Mar 2, 1993
    • Sony Corporation
    • Ohshi Miyashita
    • D03 - Travel goods and personal belongings
  • Information Patent Grant

    Headphone
    • Patent number D328461
    • Issue date Aug 4, 1992
    • Sony Corporation
    • Fumitake Daido
    • D14 - Recording, communication, or information retrieval equipment
  • Information Patent Grant

    Transmitter for a headphone
    • Patent number D325578
    • Issue date Apr 21, 1992
    • Sony Corporation
    • Takefumi Daido
    • D14 - Recording, communication, or information retrieval equipment
  • Information Patent Grant

    Headphone
    • Patent number D319241
    • Issue date Aug 20, 1991
    • Sony Corporation
    • Takefumi Daido
    • D14 - Recording, communication, or information retrieval equipment
  • Information Patent Grant

    Earphone earpiece
    • Patent number D318473
    • Issue date Jul 23, 1991
    • Ohshi Miyashita
    • D14 - Recording, communication, or information retrieval equipment
  • Information Patent Grant

    Hand held copying machine
    • Patent number D316106
    • Issue date Apr 9, 1991
    • Sony Corporation
    • Katsumi Yamatogi
    • D18 - Printing and office machinery