Noboru Hayakawa

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Activated sludge method
- Patent number 4,655,925
- Issue date Apr 7, 1987
- Nishihara Environmental Sanitation Research Corporation Limited
- Shin-ichi Tabata
- C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information Patent Grant
Centrifugal thickener
- Patent number 4,302,332
- Issue date Nov 24, 1981
- Nishihara Environmental Sanitation Research Corp., Ltd.
- Noboru Hayakawa
- C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE