Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6893036 | Bicycle frame | Mark L. Groendal | 2005-05-17 |
| 5110241 | Milling machine vise lifter and storage apparatus | — | 1992-05-05 |
| 5080384 | Bicycle frame | Mark L. Groendal | 1992-01-14 |
| 4792150 | Bicycle frame | Mark L. Groendal | 1988-12-20 |