Shigeru Toda

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Patents Grantslast 30 patents

Information Patent Grant
Agents used for improving the bottom and water quality in water are...
- Patent number 5,460,744
- Issue date Oct 24, 1995
- Biochem Industrial Ltd.
- Shigeshisa Iwai
- C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information Patent Grant
Method for improving bottom and water quality in water areas and a...
- Patent number 5,387,343
- Issue date Feb 7, 1995
- Biochem Industrial Ltd.
- Shigehisa Iwai
- C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE