Issued Patents 1989
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4887562 | Modular, self-contained hydraulic valve timing systems for internal combustion engines | — | 1989-12-19 |
| 4878461 | Variable camshaft timing system | Samuel J. Sapienza, IV, Willem Nicolaas Van Vuuren, Benjamin G. Shirey | 1989-11-07 |
| 4862844 | Valve assembly for internal combustion engine | Stephen F. Shea | 1989-09-05 |
| 4796573 | Hydraulic engine valve lifter assembly | Stephen F. Shea | 1989-01-10 |
| 4796580 | Idle control valve for use with a throttle assembly of an internal combustion engine | — | 1989-01-10 |