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Envelope gasket
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Patent number 11,268,616
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Issue date Mar 8, 2022
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Virginia Sealing Products, Inc.
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Timothy Meade Heartwell
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Manway lid gasket
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Patent number 9,944,459
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Issue date Apr 17, 2018
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Virginia Sealing Products, Inc.
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Stephen E. Benet
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
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Manway cover gasket
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Patent number 6,824,140
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Issue date Nov 30, 2004
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James E. B. Frew
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Reduced area gaskets
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Patent number 6,682,081
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Issue date Jan 27, 2004
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Inertech, Inc.
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Brian Douglas Burton
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...