Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5331927 | Exhaust port insert | Thaddeus B. Lilly, Robert A. Bolton | 1994-07-26 |
| 5080049 | Two stroke engine with tiered cylinder cooling | Robert A. Bolton, Albert A. Miller, Cletus R. Abke, Jr. | 1992-01-14 |
| 4987864 | Two cycle engine with valved pressure scavenging | Ronald J. Cantrell, Edward D. Klomp, Edward G. Groff, Michael J. Gorman | 1991-01-29 |
| 4945864 | Two cycle engine piston lubrication | Chester J. Rivard | 1990-08-07 |