TREA

Nakajima; Hidetoshi

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  • Tokyo, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Gas filter
    • Patent number 4,902,314
    • Issue date Feb 20, 1990
    • Nakajima; Hidetoshi
    • Hiroshi Mizukami
    • C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
  • Information Patent Grant

    Gas filter
    • Patent number 4,902,319
    • Issue date Feb 20, 1990
    • Watanabe; Kuniaki
    • Yoshihisa Kato
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL

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