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Duane Christensen

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  • Hastings, MN, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Integrated tab hanging file system
    • Patent number 9,586,432
    • Issue date Mar 7, 2017
    • Smead Manufacturing Company
    • Steven Charles Black
    • B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER
  • Information Patent Grant

    Stair step portfolio file
    • Patent number 9,469,148
    • Issue date Oct 18, 2016
    • Smead Manufacturing Company
    • Duane Christensen
    • B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER
  • Information Patent Grant

    Multiple pocket folders and method of manufacture
    • Patent number 9,296,247
    • Issue date Mar 29, 2016
    • Smead Manufacturing Company
    • Duane Christensen
    • B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER
  • Information Patent Grant

    Integrated tab hanging file system
    • Patent number 9,272,565
    • Issue date Mar 1, 2016
    • Smead Manufacturing Company
    • Steven Charles Black
    • B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER
  • Information Patent Grant

    File folder with multiple pockets
    • Patent number D744587
    • Issue date Dec 1, 2015
    • Smead Manufacturing Company
    • Duane Christensen
    • D19 - Office supplies
  • Information Patent Grant

    File folder with multiple pockets
    • Patent number D734390
    • Issue date Jul 14, 2015
    • Smead Manufacturing Company
    • Duane Christensen
    • D19 - Office supplies
  • Information Patent Grant

    Secure folder with double binder
    • Patent number 8,596,516
    • Issue date Dec 3, 2013
    • Smead Manufacturing Company
    • Darryll Dodson
    • B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
  • Information Patent Grant

    Integrated tab hanging file system
    • Patent number 8,550,330
    • Issue date Oct 8, 2013
    • Smead Manufacturing Company
    • Steven Charles Black
    • B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER
  • Information Patent Grant

    Stair step portfolio file
    • Patent number 8,540,138
    • Issue date Sep 24, 2013
    • Smead Manufacturing Company
    • Duane Christensen
    • B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER
  • Information Patent Grant

    Integrated tab file system
    • Patent number 8,534,534
    • Issue date Sep 17, 2013
    • Smead Manufacturing Company
    • Duane Christensen
    • B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER
  • Information Patent Grant

    Method for manufacturing stair step portfolio file
    • Patent number 8,425,387
    • Issue date Apr 23, 2013
    • Smead Manufacturing Company
    • Duane Christensen
    • B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER
  • Information Patent Grant

    Strengthened folder with inserted elements and system for element i...
    • Patent number 8,104,669
    • Issue date Jan 31, 2012
    • Smead Manufacturing Company
    • Duane Christensen
    • B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER
  • Information Patent Grant

    Integrated tab file system
    • Patent number 7,850,062
    • Issue date Dec 14, 2010
    • Smead Manufacturing Company
    • Duane Christensen
    • B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER
  • Information Patent Grant

    Reinforced expandable folders
    • Patent number 5,720,427
    • Issue date Feb 24, 1998
    • The Smead Manufacturing Company
    • Theodore V. Kachel
    • B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER
  • Information Patent Grant

    Paper handling device
    • Patent number 5,713,682
    • Issue date Feb 3, 1998
    • Smead Manufacturing Company
    • Dennis Gary Clark
    • B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER
  • Information Patent Grant

    Reinforced expandable folders
    • Patent number 5,711,750
    • Issue date Jan 27, 1998
    • Smead Manufacturing Company
    • Duane Christensen
    • B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER
  • Information Patent Grant

    Paper handling device design
    • Patent number D380495
    • Issue date Jul 1, 1997
    • The Smead Manufacturing Company
    • Steven Charles Black
    • D19 - Office supplies

Patents Applicationslast 30 patents

  • Information Patent Application

    Strengthened Folder With Inserted Elements and System for Element...
    • Publication number 20170225501
    • Publication date Aug 10, 2017
    • Smead Manufacturing Company
    • Duane Christensen
    • B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER
  • Information Patent Application

    INTEGRATED TAB HANGING FILE SYSTEM
    • Publication number 20160023497
    • Publication date Jan 28, 2016
    • Smead Manufacturing Company
    • Steven Charles Black
    • B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER
  • Information Patent Application

    Multiple Pocket Folders And Method Of Manufacture
    • Publication number 20140252074
    • Publication date Sep 11, 2014
    • Smead Manufacturing Company
    • Duane Christensen
    • B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER
  • Information Patent Application

    INTEGRATED TAB HANGING FILE SYSTEM
    • Publication number 20140151441
    • Publication date Jun 5, 2014
    • Steven Charles Black
    • B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER
  • Information Patent Application

    Strengthened Folder With Inserted Elements and System for Element...
    • Publication number 20140128236
    • Publication date May 8, 2014
    • Duane Christensen
    • B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER
  • Information Patent Application

    Strengthened Folder With Inserted Elements and System for Element...
    • Publication number 20120125985
    • Publication date May 24, 2012
    • Smead Manufacturing Company
    • Duane Christensen
    • B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER
  • Information Patent Application

    Folder With Gusset
    • Publication number 20110290866
    • Publication date Dec 1, 2011
    • Smead Manufacturing Company
    • Darryll Dodson
    • B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER
  • Information Patent Application

    Integrated Tab File System
    • Publication number 20110079636
    • Publication date Apr 7, 2011
    • Smead Manufacturing Company
    • Duane Christensen
    • B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER
  • Information Patent Application

    Folder With Gusset
    • Publication number 20110017810
    • Publication date Jan 27, 2011
    • Smead Manufacturing Company
    • Darryll Dodson
    • B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER
  • Information Patent Application

    Secure Folder with Double Binder
    • Publication number 20100116873
    • Publication date May 13, 2010
    • Darryll Dodson
    • B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
  • Information Patent Application

    Layered-construction Document Storage System
    • Publication number 20100044418
    • Publication date Feb 25, 2010
    • Smead Manufacturing Company
    • Duane Christensen
    • B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER
  • Information Patent Application

    Folder With Gusset
    • Publication number 20090045246
    • Publication date Feb 19, 2009
    • Darryll Dodson
    • B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER
  • Information Patent Application

    Strengthened Folder With Inserted Elements and System for Element...
    • Publication number 20080197175
    • Publication date Aug 21, 2008
    • Duane Christensen
    • B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER
  • Information Patent Application

    Layered-construction Document Storage System
    • Publication number 20080184604
    • Publication date Aug 7, 2008
    • Duane Christensen
    • B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER
  • Information Patent Application

    INTEGRATED TAB FILE SYSTEM
    • Publication number 20080041924
    • Publication date Feb 21, 2008
    • Duane Christensen
    • B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER
  • Information Patent Application

    INTEGRATED TAB HANGING FILE SYSTEM
    • Publication number 20080030016
    • Publication date Feb 7, 2008
    • Steven Charles Black
    • B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER
  • Information Patent Application

    Layered-construction document storage system
    • Publication number 20060162197
    • Publication date Jul 27, 2006
    • Smead Manufacturing Company
    • Duane Christensen
    • B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER