Issued Patents All Time
Showing 26–47 of 47 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5850624 | Electronic compass | Jian Jin, John C. Wisehart | 1998-12-15 |
| 5706326 | Systems and methods of determining focal spot x-axis position from projection data | — | 1998-01-06 |
| 5621325 | Avoiding ghosting artifacts during surface location of subsurface transmitters | Gregory W. Draper, Frank S. Nickel, Jian Jin | 1997-04-15 |
| 5550889 | Alignment of an x-ray tube focal spot using a deflection coil | Stephen W. Gravelle, Jiang Hsieh, Quan Lu, John W. Newman, Thomas L. Toth +1 more | 1996-08-27 |
| 5530735 | On-line measurement of x-ray tube voltage in a CT system | John M. Sandrik | 1996-06-25 |
| 5400387 | Indirect measurement of voltage applied to diagnostic x-ray tubes | John M. Sandrik | 1995-03-21 |
| 5400379 | Multi-slice x-ray CT using a detector mask | Armin H. Pfoh, Hui Hu | 1995-03-21 |
| 5271055 | Methods for reducing motion induced artifacts in a projection imaging system | Jiang Hsieh, Cameron Ritchie | 1993-12-14 |
| 5220589 | Correction circuit for a floating-point amplifier | — | 1993-06-15 |
| 5131021 | Computed tomography system with control and correction of fan beam position | August O. Englert | 1992-07-14 |
| 5105444 | System for high speed data tranmission | — | 1992-04-14 |
| 5091725 | Well logging tool and system having a switched mode power amplifier | — | 1992-02-25 |
| 5090039 | Inspecting coiled tubing for well operations | Eric S. Pasternack, Lonnie J. Smith | 1992-02-18 |
| 4992748 | Period-inverting FM demodulator | — | 1991-02-12 |
| 4916648 | Ultrasonic logging apparatus with improved receiver | — | 1990-04-10 |
| 4906928 | Transient electromagnetic apparatus with receiver having digitally controlled gain ranging amplifier for detecting irregularities on conductive containers | — | 1990-03-06 |
| 4902981 | Well casing potential measurement tool with compensated DC errors | William P. Goodwill | 1990-02-20 |
| 4891641 | Method for transmitting data over logging cable | Donald G. Kyle | 1990-01-02 |
| 4853616 | Detection of water saturation in insulation at cased road crossings | — | 1989-08-01 |
| 4837518 | Method and apparatus for measuring the electrical resistivity of geologic formations through metal drill pipe or casing | John E. E. Kingman, James D. Klein | 1989-06-06 |
| 4692909 | Adaptive seismic signal processor | Ralph E. Warmack, Kyong Ha Lee, Robert H. Maschhoff | 1987-09-08 |
| 4616316 | Medication compliance monitoring device having conductive traces upon a frangible backing of a medication compartment | John A. Hanpeter, Seth A. Eisen | 1986-10-07 |