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Pipe assembly
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Patent number 8,671,890
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Issue date Mar 18, 2014
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Diamond Power International, Inc.
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Ian S. Davidson
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F22 - STEAM GENERATION
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Steam boiler system
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Patent number 4,938,174
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Issue date Jul 3, 1990
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Spirax Sarco Limited
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Alan F. Bennett
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F22 - STEAM GENERATION
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Boiler blow down controller
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Patent number 4,070,992
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Issue date Jan 31, 1978
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Chemed Corporation
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Donald Holdt
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C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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3908605
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Patent number 3,908,605
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Issue date Sep 30, 1975
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F22 - STEAM GENERATION
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3680531
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Patent number 3,680,531
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Issue date Aug 1, 1972
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F28 - HEAT EXCHANGE IN GENERAL
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3512507
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Patent number 3,512,507
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Issue date May 19, 1970
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F22 - STEAM GENERATION
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3132631
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Patent number 3,132,631
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Issue date May 12, 1964
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F22 - STEAM GENERATION
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2921564
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Patent number 2,921,564
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Issue date Jan 19, 1960
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F22 - STEAM GENERATION
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2531286
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Patent number 2,531,286
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Issue date Nov 21, 1950
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F22 - STEAM GENERATION
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2340468
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Patent number 2,340,468
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Issue date Feb 1, 1944
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F22 - STEAM GENERATION
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2155039
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Patent number 2,155,039
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Issue date Apr 18, 1939
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F22 - STEAM GENERATION
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2023593
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Patent number 2,023,593
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Issue date Dec 10, 1935
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F22 - STEAM GENERATION