Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5782540 | Plastic wheel and method of making same | David K. Camfield, Robert N. Conn | 1998-07-21 |
| 5505493 | Bicycle with simulated motorcycle parts | David K. Camfield, Daniel G. Hahn, Duane Niemeyer, Ricke D. Shamhart | 1996-04-09 |
| 5503610 | Quick change mechanism for synchronous/asynchronous exercise machine | Jeffrey D. Metcalf | 1996-04-02 |
| D368242 | Bicycle | David K. Camfield | 1996-03-26 |
| 5499957 | Quick change mechanism for synchronous/asynchronous exercise machine | Jeffrey D. Metcalf | 1996-03-19 |
| D367021 | Simulated motorcycle engine for a bicycle | David K. Camfield | 1996-02-13 |
| 5338273 | Quick change mechanism for synchronous/asynchronous exercise machine | Jeffrey D. Metcalf | 1994-08-16 |
| 5314207 | Bicycle with simulated motorcycle parts | David K. Camfield, Daniel G. Hahn, Duane Niemeyer | 1994-05-24 |
| 4762317 | Stationary exercise device | David K. Camfield, Marion N. Craig | 1988-08-09 |