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3407625
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Patent number 3,407,625
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Issue date Oct 29, 1968
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F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
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3284610
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Patent number 3,284,610
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Issue date Nov 8, 1966
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F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
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3253421
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Patent number 3,253,421
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Issue date May 31, 1966
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F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
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2999373
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Patent number 2,999,373
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Issue date Sep 12, 1961
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F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
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2049664
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Patent number 2,049,664
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Issue date Aug 4, 1936
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F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
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1960809
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Patent number 1,960,809
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Issue date May 29, 1934
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F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
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1950703
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Patent number 1,950,703
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Issue date Mar 13, 1934
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F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...