Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4597067 | Borehole monitoring device and method | David A. Christopher, Stephen D. Lauer | 1986-06-24 |
| 4464564 | Current controller for heating stage on leitz microscope | Wiley E. Zimmerman, Jimmy R. Alexander, Don E. Boles | 1984-08-07 |
| 4452075 | Push drill guidance indication apparatus | Jimmie H. Elenburg | 1984-06-05 |
| 4409824 | Fatigue gauge for drill pipe string | Mamdouh M. Salama, Michael W. Joosten, Wiley E. Zimmerman | 1983-10-18 |
| 4264950 | Intrinsically safe regulated power supply | Wiley E. Zimmerman | 1981-04-28 |