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Tomohiro Ishikawa

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Patents Grantslast 30 patents

  • Information Patent Grant

    Optical material
    • Patent number 5,536,798
    • Issue date Jul 16, 1996
    • Tosoh Corporation
    • Toru Doi
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Optical material
    • Patent number 5,208,307
    • Issue date May 4, 1993
    • Tosoh Corporation
    • Toru Doi
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Separation membrane
    • Patent number 5,104,428
    • Issue date Apr 14, 1992
    • Tosoh Corporation
    • Toru Doi
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • Information Patent Grant

    Production of composite resins
    • Patent number 5,043,400
    • Issue date Aug 27, 1991
    • Tosoh Corporation
    • Akeharu Tsuruta
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    Aromatic sulfide amide polymer and a process for the production the...
    • Patent number 4,818,809
    • Issue date Apr 4, 1989
    • Toyo Soda Manufacturing Co., Ltd.
    • Tomohiro Ishikawa
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...