Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5367992 | Variable camshaft timing system for improved operation during low hydraulic fluid pressure | Roger P. Butterfield, Curt A. Wykstra | 1994-11-29 |
| 5361735 | Belt driven variable camshaft timing system | Roger P. Butterfield, Stanley K. Dembosky | 1994-11-08 |