Eiichi Ishiyama

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Hachioji, JP

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Patents Grantslast 30 patents

Information Patent Grant
UV ray irradiation apparatus having scraper rings fitted to light t...
- Patent number 6,013,917
- Issue date Jan 11, 2000
- Photoscience Japan Corporation
- Eiichi Ishiyama
- C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information Patent Grant
Ultraviolet ray irradiation equipment having scraper rings fitted t...
- Patent number 5,874,740
- Issue date Feb 23, 1999
- Photoscience Japan Corporation
- Eiichi Ishiyama
- C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE