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Shoei Yasuda
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Tokyo, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Contact combustion gas sensor
Patent number
7,526,942
Issue date
May 5, 2009
Riken Keiki Co., Ltd.
Seiichi Otani
G01 - MEASURING TESTING
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Patent Grant
Gas detector-alarm employing hot-wire gas sensor
Patent number
6,348,872
Issue date
Feb 19, 2002
Riken Keiko Co., Ltd.
Seiichi Otani
G08 - SIGNALLING