Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7261309 | Wheelchair drive mechanism | Brian M. Watwood, Duane DeJong | 2007-08-28 |
| 6893035 | Wheelchair drive mechanism | Brian M. Watwood, Duane DeJong | 2005-05-17 |
| 6755430 | Wheelchair drive assembly | Brian M. Watwood, Dayn E. Beals, Duane DeJong | 2004-06-29 |
| 6007082 | Wheelchair driver and braking system | Brian M. Watwood | 1999-12-28 |
| 5263729 | Wheelchair driver and braking system | Brian M. Watwood | 1993-11-23 |
| 4598450 | Method for fabricating a solar energy collector assembly utilizing a specifically designed fluid storage arrangement | James R. Thompson, Richard T. Wipfler, Richard O. Rhodes | 1986-07-08 |
| 4443151 | Automatic soil plug loader and feeder | William A. Hanacek, Thomas A. Spinetti | 1984-04-17 |
| 4422990 | Method and apparatus for making soil plugs | William A. Hanacek, Paul F. Hermann, Thorburn S. Kennedy | 1983-12-27 |
| 4388035 | Dibble tube soil plug planter | David W. Cayton, Angus B. Mackenzie | 1983-06-14 |
| 4355588 | Transplanting machine | Javier Diaz-Infante, David Hall | 1982-10-26 |
| 4294179 | Dibble tube soil plug planter | David W. Cayton, Angus B. Mackenzie | 1981-10-13 |