Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9994065 | Adjustable frame for hanging folders | Marvin J. Halfen, Daniel Darst, Dan Johnson | 2018-06-12 |
| 9642457 | Adjustable frame for hanging folders | Marvin J. Halfen, Daniel Darst, Dan Johnson | 2017-05-09 |