Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5322645 | Carburetor needle valve adjustment limiter cap and method of use | George M. Pattullo, Donald C. Ross, David L. Speirs, James E. Van Allen, Mark S. Swanson | 1994-06-21 |
| 5236634 | Carburetor needle valve adjustment limiter cap and method of adjusting fuel flow | David L. Speirs | 1993-08-17 |