TREA

Yukihisa Baba

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  • Yokohama, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Lens element and lens barrel
    • Patent number 5,361,168
    • Issue date Nov 1, 1994
    • Canon Kabushiki Kaisha
    • Takashi Arai
    • G02 - OPTICS
  • Information Patent Grant

    Method for molding optical elements
    • Patent number 5,292,457
    • Issue date Mar 8, 1994
    • Canon Kabushiki Kaisha
    • Takashi Arai
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    Method for molding optical elements
    • Patent number 5,290,488
    • Issue date Mar 1, 1994
    • Canon Kabushiki Kaisha
    • Takashi Arai
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    Method of manufacturing optical element
    • Patent number 5,269,978
    • Issue date Dec 14, 1993
    • Canon Kabushiki Kaisha
    • Sachio Umetsu
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    Method of molding optical elements
    • Patent number 5,264,160
    • Issue date Nov 23, 1993
    • Canon Kabushiki Kaisha
    • Takashi Arai
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL