John Hake

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Oakland, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
Pathogen destruction process for biosolids
- Patent number 6,447,683
- Issue date Sep 10, 2002
- Water Environment Research Foundation
- Donald Michael Douglas Gubb
- C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information Patent Grant
Method of controlling waste water treatment by anaerobic fermentation
- Patent number 5,180,494
- Issue date Jan 19, 1993
- Shimizu Construction Co., Ltd.
- Makoto Yamaguchi
- C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE