TREA

Takekuni Okamoto

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  • Tokyo, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Rubber-made covering member for push button switches
    • Patent number 4,390,765
    • Issue date Jun 28, 1983
    • Shin-Etsu Polymer Co., Ltd.
    • Ryoichi Sado
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    Key-board switch unit
    • Patent number 4,302,648
    • Issue date Nov 24, 1981
    • Shin-Etsu Polymer Co., Ltd.
    • Ryoichi Sado
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL