Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4446825 | Internal combustion engine with valves having a variable spring rate | Dante S. Giardini, David K. Trumpy | 1984-05-08 |
RI
Richard V. Iwanski
Overall (All Time): #4,033,913 of 4,157,543Top 100%
1
Patents All Time