TREA

Karl Robert Hansen

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  • Cottage Grove, MN, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    External filter chamber
    • Patent number 8,099,828
    • Issue date Jan 24, 2012
    • Tennant Company
    • Kurt Clarence Adelman
    • E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
  • Information Patent Grant

    Cyclonic filter for surface maintenance machine
    • Patent number 7,662,199
    • Issue date Feb 16, 2010
    • Tennant Company
    • Richard William Wellens
    • A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
  • Information Patent Grant

    Chain driven conveyor having automatic tensioning street sweeping m...
    • Patent number 7,520,378
    • Issue date Apr 21, 2009
    • Tennant Company
    • Karl Robert Hansen
    • E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
  • Information Patent Grant

    Rotating brush optimizing method
    • Patent number 7,488,391
    • Issue date Feb 10, 2009
    • Tennant Company
    • Karl R. Hansen
    • A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
  • Information Patent Grant

    Brush optimizer
    • Patent number 7,082,639
    • Issue date Aug 1, 2006
    • Tennant Company
    • Karl R. Hansen
    • A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
  • Information Patent Grant

    Side skirt for a surface treating apparatus
    • Patent number 6,507,968
    • Issue date Jan 21, 2003
    • Tennant Company
    • Karl Hansen
    • A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
  • Information Patent Grant

    Stacked tools for overthrow sweeping
    • Patent number 6,421,870
    • Issue date Jul 23, 2002
    • Tennant Company
    • Michael T. Basham
    • E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
  • Information Patent Grant

    Lost motion foot pedal linkage
    • Patent number 5,873,138
    • Issue date Feb 23, 1999
    • Tennant Company
    • Robert A. Geyer
    • A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...

Patents Applicationslast 30 patents

  • Information Patent Application

    External Filter Chamber
    • Publication number 20080276412
    • Publication date Nov 13, 2008
    • Kurt Clarence Adelman
    • E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
  • Information Patent Application

    Cyclonic Filter For Surface Maintenance Machine
    • Publication number 20080271420
    • Publication date Nov 6, 2008
    • Richard William Wellens
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • Information Patent Application

    Rotating brush optimizing method
    • Publication number 20060230556
    • Publication date Oct 19, 2006
    • Tennant Company
    • Karl R. Hansen
    • A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
  • Information Patent Application

    Chain driven conveyor having automatic tensioning street sweeping m...
    • Publication number 20040226122
    • Publication date Nov 18, 2004
    • TENNANT COMPANY
    • Karl Robert Hansen
    • E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
  • Information Patent Application

    Brush optimizer
    • Publication number 20030074753
    • Publication date Apr 24, 2003
    • Karl R. Hansen
    • A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...