Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7438128 | Identifying zones of origin of annular gas pressure | Richard J. Drozd, Louis W. Elrod | 2008-10-21 |
| 6912898 | Use of cesium as a tracer in coring operations | Christopher Michael Jones, Jon E. Burger, Richard J. Drozd | 2005-07-05 |
| 6120755 | Method for cleaning teeth by abrasive oral irrigation | — | 2000-09-19 |
| 5545074 | Abrasive blasting system with waste water recycling | — | 1996-08-13 |