TREA

Takaaki Irie

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Patents Grantslast 30 patents

  • Information Patent Grant

    Base structure of a turnout
    • Patent number 6,257,494
    • Issue date Jul 10, 2001
    • Yamato Kogyo Co., Ltd.
    • Kenzo Tokuoka
    • E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
  • Information Patent Grant

    Spring rail frog
    • Patent number 6,138,958
    • Issue date Oct 31, 2000
    • Yamato Kogyo Co., Ltd.
    • Takaaki Irie
    • E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
  • Information Patent Grant

    Welded nose rail used for crossing
    • Patent number 5,820,702
    • Issue date Oct 13, 1998
    • Yamato Kogyo Co., Ltd.
    • Takaaki Irie
    • E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
  • Information Patent Grant

    Spring rail frog having bendable rail with modified cross-section
    • Patent number 5,782,437
    • Issue date Jul 21, 1998
    • Yamato Kogyo Co., Ltd.
    • Takaaki Irie
    • E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
  • Information Patent Grant

    Welded nose rail used for crossing
    • Patent number 5,704,570
    • Issue date Jan 6, 1998
    • Yamato Kogyo Co., Ltd.
    • Takaaki Irie
    • E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES