TREA

Sadafumi Sakamoto

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  • Tokyo, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Receiver for personal radio paging service
    • Patent number 5,054,120
    • Issue date Oct 1, 1991
    • Kokusai Electric Co., Ltd.
    • Katsumi Ushiyama
    • G08 - SIGNALLING
  • Information Patent Grant

    Small antenna
    • Patent number 5,023,621
    • Issue date Jun 11, 1991
    • Kokusai Electric Co., Ltd.
    • Katsumi Ushiyama
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    Miniature antenna
    • Patent number 5,017,932
    • Issue date May 21, 1991
    • Kokusai Electric Co., Ltd.
    • Katsumi Ushiyama
    • H01 - BASIC ELECTRIC ELEMENTS