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Exhaust fan assembly
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Patent number 9,636,722
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Issue date May 2, 2017
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Greenheck Fan Corporation
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John William Enzenroth
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B08 - CLEANING
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Exhaust fan assembly
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Patent number 8,647,182
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Issue date Feb 11, 2014
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Greenheck Fan Corporation
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John William Enzenroth
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B08 - CLEANING
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Exhaust fan assembly
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Patent number 7,682,231
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Issue date Mar 23, 2010
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Greenheck Fan Corporation
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John William Enzenroth
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F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
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Exhaust fan assembly having H-out nozzle
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Patent number 7,547,249
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Issue date Jun 16, 2009
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Greenheck Fan Corporation
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Michael G. Seliger
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F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
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