Shigeki Sawayama

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Tsukuba, JP

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Patents Grantslast 30 patents

Information Patent Grant
Process for treating liquid waste using light under anaerobic condi...
- Patent number 6,106,719
- Issue date Aug 22, 2000
- Director General of Agency of Industrial Science and Technology
- Shigeki Sawayama
- C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information Patent Grant
Process of treating garbage with simultaneous production of methane
- Patent number 5,707,417
- Issue date Jan 13, 1998
- Director General of Agency of Industrial Science and Technology
- Shinya Yokoyama
- C05 - FERTILISERS MANUFACTURE THEREOF
Information Patent Grant
Method of removing nitrogen impurities from water using hydrocarbon...
- Patent number 5,476,787
- Issue date Dec 19, 1995
- Director General of Agency of Industrial Science and Technology
- Shinya Yokoyama
- C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE