TREA

Toshio Sugiyama

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Patents Grantslast 30 patents

  • Information Patent Grant

    Method for producing an AT-cut resonator
    • Patent number 6,629,342
    • Issue date Oct 7, 2003
    • Toyo Communication Equipment Co., Ltd.
    • Yoshiaki Tanaka
    • Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Information Patent Grant

    At-cut crystal resonator
    • Patent number 6,114,801
    • Issue date Sep 5, 2000
    • Toyo Communication Equipment Co., Ltd.
    • Yoshiaki Tanaka
    • H03 - BASIC ELECTRONIC CIRCUITRY