Issued Patents All Time
Showing 51–55 of 55 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5033559 | Drill bit with faceted profile | — | 1991-07-23 |
| 5021675 | Photoelectric mensuration device and method for determining PDC cutter wear | — | 1991-06-04 |
| 5013222 | Fuel pump for motor vehicle | James M. Sokol, Robert L. Lochmann | 1991-05-07 |
| 4676124 | Drag bit with improved cutter mount | — | 1987-06-30 |
| 4565305 | Rotary vane valve | Kenneth A. Heaton, John W. Pfeiffer | 1986-01-21 |