Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4571216 | Variable speed belt driven transmission system and method | Richard F. Stieg, Wm. Spencer Worley, Goran Gerbert | 1986-02-18 |
| 4534748 | Variable speed belt driven transmission system and method | Richard F. Stieg, W. Spencer Worley, III, Goran Gerbert | 1985-08-13 |
| 4493221 | Variable speed, belt driven transmission system, speed sensing driver pulley and method | Richard F. Stieg, W. Spencer Worley, III, Tristan D. Juergens | 1985-01-15 |