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Variable displacement reciprocating pump
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Patent number 8,668,466
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Issue date Mar 11, 2014
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Serva Corporation
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Thomas E. Allen
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F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
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Variable displacement reciprocating pump
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Patent number 7,811,064
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Issue date Oct 12, 2010
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Serva Corporation
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Thomas E. Allen
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F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
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Gel mixing system
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Patent number 7,581,872
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Issue date Sep 1, 2009
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Serva Corporation
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Thomas E. Allen
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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Gel mixing system
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Patent number 7,419,296
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Issue date Sep 2, 2008
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Serva Corporation
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Thomas E. Allen
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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77345914 - ACM
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Serial number 77345914
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Registration number 3471581
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Filing date Dec 6, 2007
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Serva Corporation
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7 - Machines and machine tools
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77230435 - SERVAFRAC
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Serial number 77230435
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Registration number 3398005
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Filing date Jul 16, 2007
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Serva Corporation
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6 - Common metals and their alloys
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77230394 - SERVACEMENTING
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Serial number 77230394
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Registration number 3401217
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Filing date Jul 16, 2007
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Serva Corporation
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7 - Machines and machine tools
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77230372 - SERVAPUMP
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Serial number 77230372
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Registration number 3397999
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Filing date Jul 16, 2007
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Serva Corporation
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7 - Machines and machine tools
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77230541 - SERVAVIEW
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Serial number 77230541
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Registration number 3421862
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Filing date Jul 16, 2007
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Serva Corporation
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9 - Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments