Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5028281 | Camshaft | William J. Hayes, Philip D. Johnson | 1991-07-02 |
| 4880477 | Process of making an austempered ductile iron article | William J. Hayes, Philip D. Johnson | 1989-11-14 |