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Steam generator
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Patent number 6,076,518
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Issue date Jun 20, 2000
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Rational GmbH
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Jaroslav Klouda
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F22 - STEAM GENERATION
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Gas burner
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Patent number 5,931,657
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Issue date Aug 3, 1999
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Jaroslav Klouda
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F23 - COMBUSTION APPARATUS COMBUSTION PROCESSES
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Heat exchanger
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Patent number 5,295,457
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Issue date Mar 22, 1994
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Rational Grosskuechentechnik Service GmbH
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Gerd Gumienny
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A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
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Hot air heat exchanger
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Patent number 5,199,416
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Issue date Apr 6, 1993
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Rational Grosskuechentechnik Service GmbH
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Gerd Gumienny
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F24 - HEATING RANGES VENTILATING
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