Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10065446 | User selectable file tab system and method | Marvin J. Halfen, Anthony Kramer | 2018-09-04 |
| 9469148 | Stair step portfolio file | Duane Christensen, Tim Blegen, Harold Peter Lindelof | 2016-10-18 |
| 8540138 | Stair step portfolio file | Duane Christensen, Tim Blegen, Harold Peter Lindelof | 2013-09-24 |
| 8425387 | Method for manufacturing stair step portfolio file | Duane Christensen, Tim Blegen, Harold Peter Lindelof | 2013-04-23 |
| 4525228 | Method of winding on foam mandrel | — | 1985-06-25 |