Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5038614 | Acoustic vibration detection of fluid leakage from conduits | John E. E. Kingman, H. Mitchell Cornette | 1991-08-13 |
| 4992997 | Stress wave telemetry system for drillstems and tubing strings | — | 1991-02-12 |
| 4968098 | Coal seam discontinuity sensor and method for coal mining apparatus | Robert L. Hirsch, Fred W. Ng | 1990-11-06 |
| 4965774 | Method and system for vertical seismic profiling by measuring drilling vibrations | Fred W. Ng, James P. DiSiena | 1990-10-23 |
| 4715451 | Measuring drillstem loading and behavior | Yih-Min Jan, Frank J. Schuh | 1987-12-29 |