TREA

Hideaki Iwama

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Patents Grantslast 30 patents

  • Information Patent Grant

    Photographic element for color diffusion transfer process
    • Patent number 4,304,850
    • Issue date Dec 8, 1981
    • Konishiroku Photo Industry Co., Ltd.
    • Mikio Koyama
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Grant

    Color diffusion transfer dye mordant
    • Patent number 4,234,671
    • Issue date Nov 18, 1980
    • Konishiroku Photo Industry Co., Ltd.
    • Hideaki Iwama
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Grant

    Photographic dye mordant
    • Patent number 4,193,800
    • Issue date Mar 18, 1980
    • Konishiroku Photo Industry Co., Ltd.
    • Hideaki Iwama
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY