Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7325526 | Four-stroke engine system | — | 2008-02-05 |
| 7096844 | Four-stroke engine lubricated by fuel mixture | Hugh B. McCullough, Edward M. Wallace | 2006-08-29 |
| 7070009 | Vibration isolation mount system (ISO) | Andrew Curtis, Derek J. Egerstaffer | 2006-07-04 |
| 6945215 | Multiple-position, operator-carried, four-stroke engine | Harry Gene Rickard, John D. Sheldon, Yoichi Imgawa | 2005-09-20 |
| 6863043 | Multi-position, operator-carried, four-cycle engine | Katsumi Kurihara, James M. Grayson | 2005-03-08 |
| 6772726 | Multiple-position, operator-carried, four-stroke engine | Harry Gene Richard, John D. Sheldon, Yoichi Imgawa | 2004-08-10 |
| 6666184 | Multi-position, operator-carried, four-cycle engine | Katsumi Kurihara, James M. Grayson | 2003-12-23 |
| 6374796 | Multiple-position, operator-carried, four-stroke engine | Harry Gene Richard, John D. Sheldon, Yoichi Imgawa | 2002-04-23 |
| 6363904 | Multi-position, operator-carried, four-cycle engine | Katsumi Kurihara, James M. Grayson | 2002-04-02 |
| 6047678 | Multi-position operator-carried four-cycle engine | Katsumi Kurihara, James M. Grayson | 2000-04-11 |
| 6039020 | Multiple-position, operator-carried, four-stroke engine | Harry Gene Richard, John D. Sheldon, Yoichi Imgawa | 2000-03-21 |
| 5701855 | Cartridge fuel internal combustion engine | Katsumi Kurihara, John E. Nemazi, William G. Conger | 1997-12-30 |