TREA

Harumasa Kajita

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  • Fujisawa, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Pay television
    • Patent number 5,272,751
    • Issue date Dec 21, 1993
    • Matsushita Electric Industrial Co., Ltd.
    • Harumasa Kajita
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Key signal conversion device for CATV system
    • Patent number 5,230,019
    • Issue date Jul 20, 1993
    • Matsushita Electric Industrial Co., Ltd.
    • Toyokazu Yanagimichi
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Cable television system
    • Patent number 5,161,187
    • Issue date Nov 3, 1992
    • Matsushita Electric Industrial Co., Ltd.
    • Harumasa Kajita
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Cable television transmission control system
    • Patent number 4,418,424
    • Issue date Nov 29, 1983
    • Matsushita Electric Industrial Co., Ltd.
    • Noriyuki Kawamoto
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE