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Diagnostic system for heat pump
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Patent number 4,146,085
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Issue date Mar 27, 1979
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Borg-Warner Corporation
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Frank E. Wills
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F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
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3714980
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Patent number 3,714,980
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Issue date Feb 6, 1973
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G05 - CONTROLLING REGULATING
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2919119
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Patent number 2,919,119
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Issue date Dec 29, 1959
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G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
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2902266
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Patent number 2,902,266
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Issue date Sep 1, 1959
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F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
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1895735
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Patent number 1,895,735
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Issue date Jan 31, 1933
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F28 - HEAT EXCHANGE IN GENERAL
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1573792
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Patent number 1,573,792
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Issue date Feb 23, 1926
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F28 - HEAT EXCHANGE IN GENERAL
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1566290
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Patent number 1,566,290
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Issue date Dec 22, 1925
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A23 - FOODS OR FOODSTUFFS THEIR TREATMENT, NOT COVERED BY OTHER CLASSES
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1142287
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Patent number 1,142,287
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Issue date Jun 8, 1915
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F24 - HEATING RANGES VENTILATING
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771512
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Patent number 771,512
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Issue date Oct 4, 1904
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F24 - HEATING RANGES VENTILATING