Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6575508 | Handle with unidirectional counterweight | Michael Biirsna | 2003-06-10 |
| 6565134 | Handle with side impact counterweight having installation position | Michael Boorsma, Christian Michael Norton, David Bruce Lehmkuhl, James Lee Salmon | 2003-05-20 |