TREA

Yahei Koyamada

Follow

Person

  • Tokyo, JP
People

Patents Grantslast 30 patents

  • Information Patent Grant

    Light frequency control apparatus
    • Patent number 5,581,389
    • Issue date Dec 3, 1996
    • Ando Electric Co., Ltd.
    • Tekken Lee
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Light frequency control apparatus
    • Patent number 5,500,762
    • Issue date Mar 19, 1996
    • Ando Electric Co., Ltd.
    • Haruyoshi Uchiyama
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE