Isamu Iwai

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Tsurumi-ku, Yokohama-shi, Kanagawa-ken 230, JP

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Patents Grantslast 30 patents

Information Patent Grant
Filter circulating type sewage disposal apparatus
- Patent number 5,387,335
- Issue date Feb 7, 1995
- Isamu Iwai
- C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information Patent Grant
Sewage disposal apparatus employing circulating filter media
- Patent number 5,308,479
- Issue date May 3, 1994
- Isamu Iwai
- C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE