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Patents Grants
last 30 patents
Information
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
Information
Patent Grant
Silane gas detecting tape
Patent number
5,397,536
Issue date
Mar 14, 1995
Riken Keiko Co., Ltd.
Nobuo Nakano
G01 - MEASURING TESTING