TREA

You Yoshitoshi

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  • Tokyo, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Optical pickup device
    • Patent number 4,897,828
    • Issue date Jan 30, 1990
    • Sony Corporation
    • You Yoshitoshi
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    Optical pickup device
    • Patent number 4,893,296
    • Issue date Jan 9, 1990
    • Sony Corporation
    • Yoshiyuki Matsumoto
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    Optical pick-up head without pick-up of stray light
    • Patent number 4,873,429
    • Issue date Oct 10, 1989
    • Sony Corporation
    • Hidehiro Kume
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    Focusing detection apparatus
    • Patent number 4,823,331
    • Issue date Apr 18, 1989
    • Sony Corporation
    • You Yoshitoshi
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    Optical disk player
    • Patent number 4,794,588
    • Issue date Dec 27, 1988
    • Sony Corporation
    • You Yoshitoshi
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Semiconductor laser apparatus for optical head
    • Patent number 4,772,784
    • Issue date Sep 20, 1988
    • Sony Corporation
    • You Yoshitoshi
    • G02 - OPTICS
  • Information Patent Grant

    Optical disk player
    • Patent number 4,731,777
    • Issue date Mar 15, 1988
    • Sony Corporation
    • You Yoshitoshi
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Optical pickup
    • Patent number 4,687,296
    • Issue date Aug 18, 1987
    • Sony Corporation
    • Yasunori Terayama
    • G11 - INFORMATION STORAGE