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Tubesheet cover plate
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Patent number 5,133,299
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Issue date Jul 28, 1992
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Aptech Engineering Services, Inc.
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Francis Rogan
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F28 - HEAT EXCHANGE IN GENERAL
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Steam generator feed water heater
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Patent number 4,679,529
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Issue date Jul 14, 1987
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Electricite de France - Service National
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Gerard Mancel
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F24 - HEATING RANGES VENTILATING
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Vapor generator
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Patent number 4,262,637
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Issue date Apr 21, 1981
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The Babcock & Wilcox Company
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Murray Wiener
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F22 - STEAM GENERATION
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3918409
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Patent number 3,918,409
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Issue date Nov 11, 1975
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F22 - STEAM GENERATION
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3291962
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Patent number 3,291,962
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Issue date Dec 13, 1966
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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2969456
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Patent number 2,969,456
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Issue date Jan 24, 1961
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F28 - HEAT EXCHANGE IN GENERAL
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2821966
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Patent number 2,821,966
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Issue date Feb 4, 1958
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F22 - STEAM GENERATION
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2331932
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Patent number 2,331,932
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Issue date Oct 19, 1943
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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1544664
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Patent number 1,544,664
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Issue date Jul 7, 1925
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F28 - HEAT EXCHANGE IN GENERAL