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Gas flow furnace
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Patent number 6,109,914
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Issue date Aug 29, 2000
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Nippon Furnace Kogyo Kabushiki Kaisha
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Mamoru Matsuo
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C21 - METALLURGY OF IRON
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Deodorizing system
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Patent number 6,066,301
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Issue date May 23, 2000
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Nippon Furnace Kogyo Kabushiki Kaisha
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Mamoru Matsuo
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F26 - DRYING
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Radiant tube burner
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Patent number 6,027,333
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Issue date Feb 22, 2000
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NKK Corporation
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Yoshiki Fujii
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F23 - COMBUSTION APPARATUS COMBUSTION PROCESSES
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Boiler
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Patent number 5,890,457
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Issue date Apr 6, 1999
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Nippon Furnace Kogyo Kabushiki Kaisha
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Ryoichi Tanaka
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F22 - STEAM GENERATION
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Low-NOx burner
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Patent number 5,846,067
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Issue date Dec 8, 1998
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Toyota Jidosha Kabushiki Kaisha
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Tomohiko Nishiyama
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F23 - COMBUSTION APPARATUS COMBUSTION PROCESSES
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Small once-through boiler
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Patent number 5,791,299
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Issue date Aug 11, 1998
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Nippon Furnace Kogyo Kabushiki Kaisha
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Mamoru Matsuo
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F22 - STEAM GENERATION
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Four-port valve
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Patent number 5,687,764
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Issue date Nov 18, 1997
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Nippon Furnace Kogyo Kabushiki Kaisha
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Ryoichi Tanaka
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Boiler
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Patent number 5,522,348
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Issue date Jun 4, 1996
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Nippon Furnace Kogyo Kabushiki Kaisha
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Ryoichi Tanaka
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F22 - STEAM GENERATION
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