TREA

Kenzo Kamiyama

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  • Hitachi, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Large capacity variable speed PWM spatial vector type sub-harmonic...
    • Patent number 5,298,848
    • Issue date Mar 29, 1994
    • Hitachi, Ltd.
    • Shigeta Ueda
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    Actuator
    • Patent number 4,983,875
    • Issue date Jan 8, 1991
    • Hitachi, Ltd.
    • Ryoso Masaki
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Grant

    Speed detecting apparatus
    • Patent number 4,839,834
    • Issue date Jun 13, 1989
    • Hitachi, Ltd.
    • Tsutomu Omae
    • G01 - MEASURING TESTING