DC

Duane Christensen

TM The Smead Manufacturing: 17 patents #1 of 49Top 3%
📍 Hastings, MN: #12 of 173 inventorsTop 7%
🗺 Minnesota: #4,302 of 52,454 inventorsTop 9%
Overall (All Time): #275,683 of 4,157,543Top 7%
17
Patents All Time

Issued Patents All Time

Showing 1–17 of 17 patents

Patent #TitleCo-InventorsDate
9586432 Integrated tab hanging file system Steven Charles Black, David Fasbender 2017-03-07
9469148 Stair step portfolio file Tim Blegen, Dennis Bowen, Harold Peter Lindelof 2016-10-18
9296247 Multiple pocket folders and method of manufacture David J. Gilbertson 2016-03-29
9272565 Integrated tab hanging file system Steven Charles Black, David Fasbender 2016-03-01
D744587 File folder with multiple pockets David J. Gilbertson 2015-12-01
D734390 File folder with multiple pockets David J. Gilbertson 2015-07-14
8596516 Secure folder with double binder Darryll Dodson 2013-12-03
8550330 Integrated tab hanging file system Steven Charles Black, David Fasbender 2013-10-08
8540138 Stair step portfolio file Tim Blegen, Dennis Bowen, Harold Peter Lindelof 2013-09-24
8534534 Integrated tab file system Michael B. Lasky 2013-09-17
8425387 Method for manufacturing stair step portfolio file Tim Blegen, Dennis Bowen, Harold Peter Lindelof 2013-04-23
8104669 Strengthened folder with inserted elements and system for element interchangeability Michael B. Lasky 2012-01-31
7850062 Integrated tab file system Michael B. Lasky 2010-12-14
5720427 Reinforced expandable folders Theodore V. Kachel, Jonathan B. Rivlin, Robert E. Hawes, Jr., Lee A. Boy, Setsuo Kanamoto +4 more 1998-02-24
5713682 Paper handling device Dennis Gary Clark, Steven Charles Black, Michael B. Lasky 1998-02-03
5711750 Reinforced expandable folders Theodore V. Kachel, Jonathan B. Rivlin, Robert E. Hawes, Jr., Lee A. Boy, Setsuo Kanamoto +4 more 1998-01-27
D380495 Paper handling device design Steven Charles Black 1997-07-01