Christensen; Duane
Patent Applications and Registrations
Patent applications and USPTO patent grants for Christensen; Duane.The latest application filed is for "strengthened folder with inserted elements and system for element interchangeability".
- Christensen; Duane - Hastings MN
| Patent | Date |
|---|---|
| Strengthened Folder With Inserted Elements and System for Element Interchangeability App 20170225501 - Christensen; Duane ; et al. | 2017-08-10 |
| Integrated tab hanging file system Grant 9,586,432 - Black , et al. March 7, 2 | 2017-03-07 |
| Stair step portfolio file Grant 9,469,148 - Christensen , et al. October 18, 2 | 2016-10-18 |
| Multiple pocket folders and method of manufacture Grant 9,296,247 - Christensen , et al. March 29, 2 | 2016-03-29 |
| Integrated tab hanging file system Grant 9,272,565 - Black , et al. March 1, 2 | 2016-03-01 |
| Integrated Tab Hanging File System App 20160023497 - Black; Steven Charles ; et al. | 2016-01-28 |
| File folder with multiple pockets Grant D744,587 - Christensen , et al. December 1, 2 | 2015-12-01 |
| File folder with multiple pockets Grant D734,390 - Christensen , et al. July 14, 2 | 2015-07-14 |
| Multiple Pocket Folders And Method Of Manufacture App 20140252074 - Christensen; Duane ; et al. | 2014-09-11 |
| Integrated Tab Hanging File System App 20140151441 - Black; Steven Charles ; et al. | 2014-06-05 |
| Strengthened Folder With Inserted Elements and System for Element Interchangeability App 20140128236 - Christensen; Duane ; et al. | 2014-05-08 |
| Secure folder with double binder Grant 8,596,516 - Dodson , et al. December 3, 2 | 2013-12-03 |
| Integrated tab hanging file system Grant 8,550,330 - Black , et al. October 8, 2 | 2013-10-08 |
| Stair step portfolio file Grant 8,540,138 - Christensen , et al. September 24, 2 | 2013-09-24 |
| Integrated tab file system Grant 8,534,534 - Christensen , et al. September 17, 2 | 2013-09-17 |
| Method for manufacturing stair step portfolio file Grant 8,425,387 - Christensen , et al. April 23, 2 | 2013-04-23 |
| Strengthened Folder With Inserted Elements and System for Element Interchangeability App 20120125985 - Christensen; Duane ; et al. | 2012-05-24 |
| Strengthened folder with inserted elements and system for element interchangeability Grant 8,104,669 - Christensen , et al. January 31, 2 | 2012-01-31 |
| Folder With Gusset App 20110290866 - Dodson; Darryll ; et al. | 2011-12-01 |
| Integrated Tab File System App 20110079636 - Christensen; Duane ; et al. | 2011-04-07 |
| Folder With Gusset App 20110017810 - Dodson; Darryll ; et al. | 2011-01-27 |
| Integrated tab file system Grant 7,850,062 - Christensen , et al. December 14, 2 | 2010-12-14 |
| Secure Folder with Double Binder App 20100116873 - Dodson; Darryll ; et al. | 2010-05-13 |
| Layered-construction Document Storage System App 20100044418 - Christensen; Duane | 2010-02-25 |
| Folder With Gusset App 20090045246 - Dodson; Darryll ; et al. | 2009-02-19 |
| Strengthened Folder With Inserted Elements and System for Element Interchangeability App 20080197175 - Christensen; Duane ; et al. | 2008-08-21 |
| Layered-construction Document Storage System App 20080184604 - Christensen; Duane | 2008-08-07 |
| Integrated Tab File System App 20080041924 - Christensen; Duane ; et al. | 2008-02-21 |
| Integrated Tab Hanging File System App 20080030016 - Black; Steven Charles ; et al. | 2008-02-07 |
| Layered-construction document storage system App 20060162197 - Christensen; Duane | 2006-07-27 |
| Reinforced expandable folders Grant 5,711,750 - Christensen , et al. January 27, 1 | 1998-01-27 |
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