TREA

Isao Ohtawara

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  • Gunma, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Automatic telephone answering apparatus
    • Patent number 4,856,051
    • Issue date Aug 8, 1989
    • Sanyo Electric Co., Ltd.
    • Isao Ohtawara
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Party selecting circuit arrangement
    • Patent number 4,817,133
    • Issue date Mar 28, 1989
    • Sanyo Electric Co., Ltd.
    • Ryoichi Takahashi
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Telephone call selector
    • Patent number 4,802,202
    • Issue date Jan 31, 1989
    • Sanyo Electric Co., Ltd.
    • Ryoichi Takahashi
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE