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Expeller with a gas-bubble pump
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Patent number 5,291,754
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Issue date Mar 8, 1994
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Hans Stierlin
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F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
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2269099
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Patent number 2,269,099
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Issue date Jan 6, 1942
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F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
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2203074
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Patent number 2,203,074
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Issue date Jun 4, 1940
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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...
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1858841
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Patent number 1,858,841
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Issue date May 17, 1932
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F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
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1729355
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Patent number 1,729,355
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Issue date Sep 24, 1929
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F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...