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Hironobu Kawai
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Sagamihara, JP
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last 30 patents
Information
Patent Grant
Photoelectric smoke detector with expanded visual field
Patent number
5,302,837
Issue date
Apr 12, 1994
Hochiki Corporation
Hiroshi Sawa
G08 - SIGNALLING
Information
Patent Grant
Scattered-light smoke detector with a shielding structure of detect...
Patent number
4,897,634
Issue date
Jan 30, 1990
Hochiki Kabushiki Kaisha
Hiroshi Sawa
G08 - SIGNALLING
Information
Patent Grant
Photoelectric smoke detector with permanently fixed insect net
Patent number
4,851,819
Issue date
Jul 25, 1989
Hochiki Kabushiki Kaisha
Hironobu Kawai
G08 - SIGNALLING