Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7500928 | Randomized chain system | Roger P. Butterfield | 2009-03-10 |
| 7229375 | Back drive silent chain system with low profile sprocket | Harold J. Fraboni | 2007-06-12 |
| 6155943 | Randomized sprocket for roller chain | Timothy J. Ledvina | 2000-12-05 |