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Ryusuke Kamanaka
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Chigasaki, JP
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last 30 patents
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Patent Grant
Hot-air furnace
Patent number
5,062,409
Issue date
Nov 5, 1991
Nepon Company, Ltd
Ryusuke Kamanaka
F24 - HEATING RANGES VENTILATING
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Patent Grant
Heat exchange apparatus with blower and helical conduit system
Patent number
4,556,103
Issue date
Dec 3, 1985
Nepon Co. Ltd.
Masatoshi Kuwa
F28 - HEAT EXCHANGE IN GENERAL