Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4794380 | Means and method for determining the rotation direction of an oil well pumping unit crank arm | Richard S. Simpson | 1988-12-27 |
JD
Jack Dennison
Overall (All Time): #3,965,585 of 4,157,543Top 100%
1
Patents All Time