TREA

Hiroki Hasegawa

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  • Kawasaki, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    ISDN interface unit
    • Patent number 5,764,643
    • Issue date Jun 9, 1998
    • Fujitsu Limited
    • Tomoyoshi Takebayashi
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    ISDN interface unit
    • Patent number 5,638,373
    • Issue date Jun 10, 1997
    • Fujitsu Limited
    • Tomoyoshi Takebayashi
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    ISDN interface unit with separate ring generator
    • Patent number 5,563,943
    • Issue date Oct 8, 1996
    • Fujitsu Limited
    • Tomoyoshi Takebayashi
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    ISDN interface unit
    • Patent number 5,450,412
    • Issue date Sep 12, 1995
    • Fujitsu Limited
    • Tomoyoshi Takebayashi
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE