Issued Patents 2005
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6880872 | Lever handle return spring assembly | Darren C. Eller, Daniel R. Seymour | 2005-04-19 |
| 6860129 | Security classroom function lock mechanism | Darren C. Eller, David A. Sorenson | 2005-03-01 |