Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6823686 | Pressure equalization system and method | Eugene Chumley, Larry Pippin, William Z. Sun, Timothy Wampler, Charles E. Zimmerman +2 more | 2004-11-30 |
| 6584791 | Pressure equalization system and method | David Monk, Larry Pippin, William Z. Sun, Timothy Wampler, Charles E. Zimmerman | 2003-07-01 |
| 5542341 | Wrist pin construction | David Monk, Kevin Mumpower | 1996-08-06 |