Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5450783 | Low emission piston ring | — | 1995-09-19 |
| 4947811 | Floating valve stem seal | — | 1990-08-14 |
| 4909202 | Frustoconical valve stem sealing element | Philip L. Bond, David F. Fiedler, Ivan J. Bruns | 1990-03-20 |