Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6643221 | Structures and methods for damping tool waves particularly for acoustic logging tools | Chaur-Jian Hsu, Jahir Pabon, Richard D. Joyce, Ralph M. D'Angelo, Pierre Campanac +4 more | 2003-11-04 |
| 5753812 | Transducer for sonic logging-while-drilling | Shu-Kong Chang, Donald A. Klasel, Ting M. Lau | 1998-05-19 |
| 5043952 | Monopole transmitter for a sonic well tool | David C. Hoyle, Albert H. Wignall, Anthony K. Booer | 1991-08-27 |
| 5036945 | Sonic well tool transmitter receiver array including an attenuation and delay apparatus | David C. Hoyle, Albert H. Wignall | 1991-08-06 |