Keizo Tsukada

Person

  • Kawaguchi, JP

Patents Grantslast 30 patents

  • Information Patent Grant

    Cordless telephone apparatus having a low power stand-by mode and a...

    • Patent number 5,363,430
    • Issue date Nov 8, 1994
    • Sony Corporation
    • Masato Yamagata
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Cordless telephone

    • Patent number 4,650,931
    • Issue date Mar 17, 1987
    • Sony Corporation
    • Keizo Tsukada
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Cordless telephone

    • Patent number 4,640,987
    • Issue date Feb 3, 1987
    • Keizo Tsukada
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Cordless telephone

    • Patent number 4,639,550
    • Issue date Jan 27, 1987
    • Sony Corporation
    • Masato Yamagawa
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Timer circuit

    • Patent number 4,267,467
    • Issue date May 12, 1981
    • Sony Corporation
    • Keizo Tsukada
    • H03 - BASIC ELECTRONIC CIRCUITRY
  • Information Patent Grant

    Power amplifier circuit

    • Patent number 4,205,274
    • Issue date May 27, 1980
    • Sony Corporation
    • Keizo Tsukada
    • H03 - BASIC ELECTRONIC CIRCUITRY