TREA

Yoshizawa Keiichi

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  • Tokyo, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Desk top cleaner
    • Patent number 5,319,819
    • Issue date Jun 14, 1994
    • Seikosha Co., Ltd.
    • Keiichi Yoshizawa
    • A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
  • Information Patent Grant

    Desk top cleaner
    • Patent number 5,285,549
    • Issue date Feb 15, 1994
    • Seikosha Co., Ltd.
    • Keiichi Yoshizawa
    • A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
  • Information Patent Grant

    Automatic feeder
    • Patent number 5,037,018
    • Issue date Aug 6, 1991
    • Seikosha Co., Ltd.
    • Takumi Matsuda
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Magnetic tape cassette wrapper
    • Patent number 4,782,956
    • Issue date Nov 8, 1988
    • TDK Electronics Co., Ltd.
    • Keiichi Yoshizawa
    • B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
  • Information Patent Grant

    Alarm mechanism
    • Patent number 4,748,602
    • Issue date May 31, 1988
    • Seikosha Co., Ltd.
    • Keiichi Yoshizawa
    • G04 - HOROLOGY
  • Information Patent Grant

    Alarm on-off mechanism for alarm watch
    • Patent number 4,727,526
    • Issue date Feb 23, 1988
    • Seikosha Co., Ltd.
    • Yukio Tajima
    • G04 - HOROLOGY
  • Information Patent Grant

    Alarm mechanism
    • Patent number 4,693,612
    • Issue date Sep 15, 1987
    • Seikosha Co., Ltd.
    • Keiichi Yoshizawa
    • G04 - HOROLOGY
  • Information Patent Grant

    Wrapping sheet for magnetic tape cassette
    • Patent number D283458
    • Issue date Apr 15, 1986
    • TDK Electronics Co., Ltd.
    • Keiichi Yoshizawa
    • D59 -
  • Information Patent Grant

    Video cassette case
    • Patent number D282445
    • Issue date Feb 4, 1986
    • TDK Electronics Co., Ltd.
    • Keiichi Yoshizawa
    • D09 - Packages and containers for goods
  • Information Patent Grant

    Video cassette case
    • Patent number D282444
    • Issue date Feb 4, 1986
    • TDK Electronics Co., Ltd.
    • Keiichi Yoshizawa
    • D09 - Packages and containers for goods
  • Information Patent Grant

    Casing for a video tape cassette
    • Patent number 4,501,359
    • Issue date Feb 26, 1985
    • TDK Corporation
    • Keiichi Yoshizawa
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    Case for a magnetic tape magazine
    • Patent number D275654
    • Issue date Sep 25, 1984
    • TDK Electronics Co., Ltd.
    • Keiichi Yoshizawa
    • D09 - Packages and containers for goods
  • Information Patent Grant

    Packaging container
    • Patent number D266829
    • Issue date Nov 9, 1982
    • TDK Electronics Co., Ltd.
    • Keiichi Yoshizawa
    • D09 - Packages and containers for goods
  • Information Patent Grant

    Magazine of magnetic tape
    • Patent number D266419
    • Issue date Oct 5, 1982
    • TDK Electronics Co., Ltd.
    • Hidehisa Hashimoto
    • D14 - Recording, communication, or information retrieval equipment
  • Information Patent Grant

    Label for a cassette holder
    • Patent number D266437
    • Issue date Oct 5, 1982
    • TDK Electronics Co., Ltd.
    • Keiichi Yoshizawa
    • D20 - Sales and advertising equipment
  • Information Patent Grant

    Demagnetizing device
    • Patent number D263952
    • Issue date Apr 20, 1982
    • TDK Electronics
    • Keiichi Yoshizawa
    • D13 - Equipment for production, distribution, or transformation of energy
  • Information Patent Grant

    Case for a magnetic tape magazine
    • Patent number D263794
    • Issue date Apr 13, 1982
    • TDK Electronics Co., Ltd.
    • Keiichi Yoshizawa
    • D09 - Packages and containers for goods
  • Information Patent Grant

    Label for a cassette holder
    • Patent number D263060
    • Issue date Feb 16, 1982
    • TDK Electronics Co., Ltd.
    • Keiichi Yoshizawa
    • D20 - Sales and advertising equipment
  • Information Patent Grant

    Casette tape
    • Patent number D262876
    • Issue date Feb 2, 1982
    • TDK Electronics Co., Ltd.
    • Keiichi Yoshizawa
    • D14 - Recording, communication, or information retrieval equipment
  • Information Patent Grant

    Casette tape
    • Patent number D262877
    • Issue date Feb 2, 1982
    • TDK Electronics Co., Ltd.
    • Keiichi Yoshizawa
    • D14 - Recording, communication, or information retrieval equipment
  • Information Patent Grant

    Storage unit
    • Patent number D260339
    • Issue date Aug 25, 1981
    • TDK Electronics Co., Ltd.
    • Keiichi Yoshizawa
    • D06 - Furnishings
  • Information Patent Grant

    Magnetic head eraser
    • Patent number D258585
    • Issue date Mar 17, 1981
    • TDK Electronics Co., Ltd.
    • Keiichi Yoshizawa
    • D14 - Recording, communication, or information retrieval equipment
  • Information Patent Grant

    Apparatus for rewinding magnetic tape in video cassette
    • Patent number 4,257,079
    • Issue date Mar 17, 1981
    • TDK Electronics Co., Ltd.
    • Keiichi Yoshizawa
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    Video tape cassette
    • Patent number D258287
    • Issue date Feb 17, 1981
    • TDK Electronics Co., Ltd.
    • Hidehisa Hashimoto
    • D14 - Recording, communication, or information retrieval equipment
  • Information Patent Grant

    Sectional rack
    • Patent number 4,223,613
    • Issue date Sep 23, 1980
    • TDK Electronics Co., Ltd.
    • Keiichi Yoshizawa
    • A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
  • Information Patent Grant

    Compact hand-held demagnetizing device
    • Patent number 4,218,722
    • Issue date Aug 19, 1980
    • TDK Electronics Company Limited
    • Keiichi Yoshizawa
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    Timepiece
    • Patent number 4,175,374
    • Issue date Nov 27, 1979
    • Kabushiki Kaisha Seikosha
    • Keiichi Yoshizawa
    • G04 - HOROLOGY
  • Information Patent Grant

    Hand-operated bulk eraser for magnetic tape cassettes
    • Patent number 4,157,581
    • Issue date Jun 5, 1979
    • TDK Electronics Co., Ltd.
    • Yoshizawa Keiichi
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    Demagnetizer for a magnetic head of a recording-reproducing device
    • Patent number 4,135,219
    • Issue date Jan 16, 1979
    • TDK Electronics Co., Ltd.
    • Keiichi Yoshizawa
    • G11 - INFORMATION STORAGE