TREA

Tadao OIWA

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  • Osaka, JP
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Patents Grantslast 30 patents

Patents Applicationslast 30 patents

  • Information Patent Application

    RAW WATER TREATMENT METHOD
    • Publication number 20170107122
    • Publication date Apr 20, 2017
    • NAGAOKA INTERNATIONAL CORP.
    • Hitoshi MIMURA
    • C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • Information Patent Application

    CLEANING SYSTEM FOR SAND FILTRATION LAYER
    • Publication number 20150314221
    • Publication date Nov 5, 2015
    • HITACHI ZOSEN CORPORATION
    • Masaki INUI
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • Information Patent Application

    UPPER-LAYER CLEANING DEVICE FOR WATER TREATMENT DEVICE, AND METHOD...
    • Publication number 20140190907
    • Publication date Jul 10, 2014
    • NAGAOKA INTERNATIONAL CORPORATION
    • Hitoshi Mimura
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL