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Exhaust system interlocking mechanism
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Patent number 8,672,367
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Issue date Mar 18, 2014
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M&G DuraVent, Inc.
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John R. Jacklich
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Gasket-less vent pipe coupling
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Patent number 8,505,981
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Issue date Aug 13, 2013
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M&G DuraVent, Inc.
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John R. Jacklich
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F23 - COMBUSTION APPARATUS COMBUSTION PROCESSES
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Direct vent cap
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Patent number 8,156,931
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Issue date Apr 17, 2012
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M&G DuraVent, Inc.
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John R. Jacklich
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F24 - HEATING RANGES VENTILATING
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Direct vent cap
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Patent number D552726
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Issue date Oct 9, 2007
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Simpson Dura-Vent Company, Inc.
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John R. Jacklich
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D23 - Environmental heating and cooling
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Vent cap
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Patent number D552725
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Issue date Oct 9, 2007
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Simpson Dura-Vent Company, Inc.
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John R. Jacklich
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D23 - Environmental heating and cooling