Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4867113 | Reduced friction engine tappet construction | John Matthew Pieprzak | 1989-09-19 |
PW
Pierre A. Willermet
Overall (1989): #68,351 of 140,708Top 50%
1
Patents 1989