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2452699
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Patent number 2,452,699
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Issue date Nov 2, 1948
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F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
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2377000
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Patent number 2,377,000
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Issue date May 29, 1945
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F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
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2361075
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Patent number 2,361,075
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Issue date Oct 24, 1944
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F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
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2321113
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Patent number 2,321,113
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Issue date Jun 8, 1943
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F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
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2267893
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Patent number 2,267,893
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Issue date Dec 30, 1941
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F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
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2242281
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Patent number 2,242,281
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Issue date May 20, 1941
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F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
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2220295
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Patent number 2,220,295
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Issue date Nov 5, 1940
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F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
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2185001
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Patent number 2,185,001
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Issue date Dec 26, 1939
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F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
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2152269
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Patent number 2,152,269
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Issue date Mar 28, 1939
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F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
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2136600
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Patent number 2,136,600
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Issue date Nov 15, 1938
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F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...