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Seiji Sakamoto

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  • Tokyo, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Polyester film for sublimation type thermal transfer printing
    • Patent number 5,863,641
    • Issue date Jan 26, 1999
    • Diafoil Hoechst Company, Ltd.
    • Seiji Sakamoto
    • B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
  • Information Patent Grant

    Biaxially oriented polyester film for magnetic recording medium
    • Patent number 5,670,236
    • Issue date Sep 23, 1997
    • Diafoil Hoechst Company, Ltd.
    • Tomoyuki Kotani
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Biaxially oriented polyester film for capacitor dielectric
    • Patent number 5,401,558
    • Issue date Mar 28, 1995
    • Diafoil Hoechst Co., Ltd.
    • Seiji Sakamoto
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Magnetic recording medium comprising a polyethylene-2,6-naphthalate...
    • Patent number 5,364,684
    • Issue date Nov 15, 1994
    • Diafoil Hoechst Company, Limited
    • Seiji Sakamoto
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    Biaxially stretched polyester film
    • Patent number 5,324,574
    • Issue date Jun 28, 1994
    • Diafoil Hoechst Company, Ltd.
    • Seiji Sakamoto
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Polyester film for magnetic recording media
    • Patent number 5,164,439
    • Issue date Nov 17, 1992
    • Diafoil Company, Ltd.
    • Seiji Sakamoto
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Biaxially oriented polyester film
    • Patent number 5,096,773
    • Issue date Mar 17, 1992
    • Diafoil Company, Limited
    • Seiji Sakamoto
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Biaxially oriented polyester film
    • Patent number 5,061,571
    • Issue date Oct 29, 1991
    • Diafoil Company, Limited
    • Seiji Sakamoto
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Polyester composition
    • Patent number 5,023,291
    • Issue date Jun 11, 1991
    • Diafoil Company, Limited
    • Seiji Sakamoto
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Polyester film for magnetic recording media
    • Patent number 5,006,589
    • Issue date Apr 9, 1991
    • Diafoil Company, Limited
    • Seiji Sakamoto
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    Polyphenylene sulfide film
    • Patent number 4,886,705
    • Issue date Dec 12, 1989
    • Diafoil Company, Limited
    • Seiji Sakamoto
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Polyester film for magnetic recording tape
    • Patent number 4,840,830
    • Issue date Jun 20, 1989
    • Diafoil Company, Limited
    • Seiji Sakamoto
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Polyester films suitable for use in magnetic tapes
    • Patent number 4,767,657
    • Issue date Aug 30, 1988
    • Diafoil Company, Limited
    • Seiji Sakamoto
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    Polyethylene naphthalate film
    • Patent number 4,732,799
    • Issue date Mar 22, 1988
    • Diafoil Company, Limited
    • Seiji Sakamoto
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Electrical insulating material
    • Patent number 4,729,915
    • Issue date Mar 8, 1988
    • Diafoil Company, Limited
    • Seiji Sakamoto
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    Polyester film containing fine powder of crosslinked polymer
    • Patent number 4,320,207
    • Issue date Mar 16, 1982
    • Diafoil Company Limited
    • Masamichi Watanabe
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Polyester films
    • Patent number 4,101,523
    • Issue date Jul 18, 1978
    • Mitsubishi Chemical Industries Limited
    • Masamichi Watanabe
    • C07 - ORGANIC CHEMISTRY