Issued Patents 2011
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7980329 | System for managing variable density drilling mud | Paul Matthew Spiecker, Ramesh Gupta, Richard S. Polizzotti, Barbara Carstensen, Dennis G. Peiffer +1 more | 2011-07-19 |