Akio Koyama

Person

  • Chiba, JP

Patents Grantslast 30 patents

  • Information Patent Grant

    Sintered ceramic body

    • Patent number 4,939,106
    • Issue date Jul 3, 1990
    • TDK Corporation
    • Toshinobu Miyakoshi
    • C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES