Keiji Shimizu

Person

  • Tokyo, JP

Patents Grantslast 30 patents

  • Information Patent Grant

    Insulating plate for rail insulated joint

    • Patent number 4,630,772
    • Issue date Dec 23, 1986
    • Matsushita Electric Industrial Co., Ltd.
    • Kainen Watanabe
    • E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES