Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6969257 | Golf swing timing/training device | — | 2005-11-29 |
| 6739924 | Remotely activated buoy | Linwood Pete Smith | 2004-05-25 |
| 5544844 | Autogyro aircraft | David L. Groen | 1996-08-13 |
| 5304036 | Autogyro aircraft | David L. Groen | 1994-04-19 |
| 5301900 | Autogyro aircraft | David L. Groen | 1994-04-12 |
| 4361111 | Golf ball dry rack | — | 1982-11-30 |