Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9839937 | Method of making a powder coated protected prong file fastener | Marvin J. Halfen, David J. Gilbertson | 2017-12-12 |
| 9469148 | Stair step portfolio file | Duane Christensen, Tim Blegen, Dennis Bowen | 2016-10-18 |
| 9114597 | Protected prong file fastener and method of manufacture | Marvin J. Halfen, David J. Gilbertson, Robert Scudder, Michael C. Goodson, Michael Hacker | 2015-08-25 |
| 8747588 | Protected prong file fastener and method of making | Marvin J. Halfen, David J. Gilbertson | 2014-06-10 |
| 8746314 | Protected prong file fastener and method of manufacture | Marvin J. Halfen, David J. Gilbertson, Robert Scudder, Michael C. Goodson, Michael Hacker | 2014-06-10 |
| 8540138 | Stair step portfolio file | Duane Christensen, Tim Blegen, Dennis Bowen | 2013-09-24 |
| 8425387 | Method for manufacturing stair step portfolio file | Duane Christensen, Tim Blegen, Dennis Bowen | 2013-04-23 |
| 8414211 | Protected prong file fastener | Marvin J. Halfen, David J. Gilbertson, Robert Scudder, Michael C. Goodson, Michael Hacker | 2013-04-09 |
| 7182330 | Intelligent autonomous sheet feeder for the infeed of a printer | Leon David Wirth | 2007-02-27 |