Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9469148 | Stair step portfolio file | Duane Christensen, Dennis Bowen, Harold Peter Lindelof | 2016-10-18 |
| 8540138 | Stair step portfolio file | Duane Christensen, Dennis Bowen, Harold Peter Lindelof | 2013-09-24 |
| 8425387 | Method for manufacturing stair step portfolio file | Duane Christensen, Dennis Bowen, Harold Peter Lindelof | 2013-04-23 |