Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5551388 | Piston with cavity | — | 1996-09-03 |
| 5392511 | Manufacture of camshafts | Michael M. Copeland | 1995-02-28 |
| 5125551 | Cylinder head gasket | — | 1992-06-30 |
| 5056390 | Workpiece holding devices | — | 1991-10-15 |
| 4969425 | Piston with a resonant cavity | — | 1990-11-13 |
| 4864985 | Rotary valve | — | 1989-09-12 |
| 4841927 | Ceramic cylinders | — | 1989-06-27 |
| 4646595 | Machine tools | — | 1987-03-03 |
| 4638694 | Manufacture of pistons | — | 1987-01-27 |
| 4616389 | Manufacture of camshafts | — | 1986-10-14 |
| 4612833 | Machine tools | — | 1986-09-23 |
| 4522161 | Valve seat inserts | — | 1985-06-11 |
| 4510895 | Pistons for internal combustion engines | — | 1985-04-16 |
| 4438740 | Valve seat inserts for internal combustion engines | — | 1984-03-27 |