TREA

Yoshio Shinagawa

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  • Kuga, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Electret filters
    • Patent number 5,304,227
    • Issue date Apr 19, 1994
    • Mitsui Petrochemical Industries, Ltd.
    • Satoshi Matsuura
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • Information Patent Grant

    Film electret and an electret filter
    • Patent number 5,256,176
    • Issue date Oct 26, 1993
    • Mitsui Petrochemical Industries, Ltd.
    • Satoshi Matsuura
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • Information Patent Grant

    Method for producing electret filter
    • Patent number 5,246,637
    • Issue date Sep 21, 1993
    • Mitsui Petrochemical Industries, Ltd.
    • Satoshi Matsuura
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    Processes for preparing electret filters
    • Patent number 5,143,767
    • Issue date Sep 1, 1992
    • Mitsui Petrochemical Industries, Ltd.
    • Satoshi Matsuura
    • D04 - BRAIDING LACE-MAKING KNITTING TRIMMINGS NON-WOVEN FABRICS