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Heat exchanger
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Patent number 5,573,060
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Issue date Nov 12, 1996
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Rolls-Royce and Associates limited
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Colin I. Adderley
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F28 - HEAT EXCHANGE IN GENERAL
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Heat exchanger
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Patent number 5,465,785
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Issue date Nov 14, 1995
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Rolls-Royce plc
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Colin I. Adderley
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F28 - HEAT EXCHANGE IN GENERAL
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Air-to-air heat exchanger
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Patent number 3,995,688
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Issue date Dec 7, 1976
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William J. Darm
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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3912004
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Patent number 3,912,004
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Issue date Oct 14, 1975
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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3262496
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Patent number 3,262,496
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Issue date Jul 26, 1966
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F28 - HEAT EXCHANGE IN GENERAL
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1831533
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Patent number 1,831,533
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Issue date Nov 10, 1931
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F28 - HEAT EXCHANGE IN GENERAL