B03B 4/06

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Patent/Pub #TitleFiling DateIssue/Publication DatePatent Owner
9968942 Method and apparatus for separating contaminants from compost and other recyclable materialsJun 29, 16May 15, 18Boreal Compost Enterprises Ltd.
9889450 Powder classification system and methodDec 04, 14Feb 13, 18UNITED TECHNOLOGIES CORPORATION
9849462 Sifting apparatusesMay 03, 16Dec 26, 17SNOBY SEPARATION SYSTEMS, LLC
9802204 Extended riffle structure for a dry washerJan 21, 16Oct 31, 17Not available
9586211 Kreeger sluiceDec 23, 14Mar 07, 17Marsh, John Anthony
9561510 Sifting apparatusSep 16, 15Feb 07, 17SNOBY SEPARATION SYSTEMS, LLC
9259740 Extended riffle structure for a dry washerSep 10, 14Feb 16, 16Not available
9033155 Screening device and method of screeningJun 28, 11May 19, 15GENERAL ELECTRIC TECHNOLOGY GMBH