Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9482153 | Oil retention in the bore/piston interfaces of ported cylinders in opposed-piston engines | Brian J. Callahan, Bryant A. Wagner | 2016-11-01 |
| 5997372 | Marine propulsion device with an improved lubricant management system | George D. Idzikowski | 1999-12-07 |
| 5937802 | Engine cooling system | Mark A. Ruman, Donald R. Kellermann, Robert J. Baumhardt | 1999-08-17 |
| 4864986 | Two-cycle engine with offset piston ovality | Robert J. Baumhardt | 1989-09-12 |