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Boiler
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Patent number 8,555,820
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Issue date Oct 15, 2013
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Miura Co., Ltd.
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Soji Sumi
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F28 - HEAT EXCHANGE IN GENERAL
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Water tube boiler
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Patent number 5,273,002
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Issue date Dec 28, 1993
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Gadelius Sunrod AB
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Endre Balint
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F22 - STEAM GENERATION
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3157163
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Patent number 3,157,163
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Issue date Nov 17, 1964
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F22 - STEAM GENERATION
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2921565
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Patent number 2,921,565
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Issue date Jan 19, 1960
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F22 - STEAM GENERATION
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2551137
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Patent number 2,551,137
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Issue date May 1, 1951
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F22 - STEAM GENERATION
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2217594
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Patent number 2,217,594
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Issue date Oct 8, 1940
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F22 - STEAM GENERATION
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2206265
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Patent number 2,206,265
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Issue date Jul 2, 1940
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F22 - STEAM GENERATION
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1676631
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Patent number 1,676,631
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Issue date Jul 10, 1928
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F22 - STEAM GENERATION