TREA

Akio Koizumi

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  • Tokyo, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Power amplifier
    • Patent number 4,476,436
    • Issue date Oct 9, 1984
    • Sony Corporation
    • Akio Koizumi
    • H03 - BASIC ELECTRONIC CIRCUITRY
  • Information Patent Grant

    Transformer
    • Patent number 4,335,423
    • Issue date Jun 15, 1982
    • Sony Corporation
    • Akio Koizumi
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    DC to DC Converter
    • Patent number 4,276,587
    • Issue date Jun 30, 1981
    • Sony Corporation
    • Akio Koizumi
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    Switching regulator
    • Patent number 4,236,198
    • Issue date Nov 25, 1980
    • Sony Corporation
    • Mitsuo Ohsawa
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    Switching regulator
    • Patent number 4,236,196
    • Issue date Nov 25, 1980
    • Sony Corporation
    • Akio Koizumi
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    Switching regulator
    • Patent number 4,223,378
    • Issue date Sep 16, 1980
    • Sony Corporation
    • Akio Koizumi
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    Protective circuit for a switching regulator
    • Patent number 4,210,947
    • Issue date Jul 1, 1980
    • Sony Corporation
    • Akio Koizumi
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    Control circuit for use in a switching-type regulator
    • Patent number 4,180,852
    • Issue date Dec 25, 1979
    • Sony Corporation
    • Akio Koizumi
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER