Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7040437 | Engine air intake system | Richard A. Fredrickson, Jim Vizanko | 2006-05-09 |
| 6431561 | Snowmobile with asymmetric skis | — | 2002-08-13 |
| 6158215 | Varible exhaust resonance chamber valve system for two-cycle engines | John Bradley Bosch, Richard A. Fredrickson, Kevin Ness | 2000-12-12 |
| 6109217 | Snowmobile with improved cooling system | Jack R. Olson, Lyle J. Dahlgren, Richard H. Bates, Jr., Aaron Johnson | 2000-08-29 |