Issued Patents All Time
Showing 26–46 of 46 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8614578 | Attenuation of electromagnetic signals passing through conductive material | Guozhong Gao, H. Frank Morrison, Richard A. Rosthal, David Alumbaugh, Cyrille Levesque | 2013-12-24 |
| 8554029 | Through-bore fiber optic slipring | Boying B. Zhang, Louis D. Violante | 2013-10-08 |
| 8456166 | Single-well through casing induction logging tool | Luis E. Depavia | 2013-06-04 |
| 8417075 | Multi-channel electro-magnetic rotary joint using a trapezoidal metamaterial de-rotating mechanism | Louis D. Violante, Boying B. Zhang | 2013-04-09 |
| 8380024 | Integrated electro-optical fluid rotary joint | Boying B. Zhang, Louis D. Violante | 2013-02-19 |
| 8362780 | Induction coil impedance modeling using equivalent circuit parameters | Richard A. Rosthal | 2013-01-29 |
| 8355607 | Fiber optic rotary joint mechanism | Boying B. Zhang | 2013-01-15 |
| 8332191 | Correction factors for electromagnetic measurements made through conductive material | Richard A. Rosthal, Cyrille Levesque, Guozhong Gao, H. Frank Morrison, David Alumbaugh | 2012-12-11 |
| 8326539 | Characterizing at least one property of a liner that lines a well | Frank Morrison, Edward Nichols, Richard A. Rosthal, Luis E. Depavia | 2012-12-04 |
| 8310239 | Detecting electrical current in a magnetic structure | Richard A. Rosthal | 2012-11-13 |
| 8181057 | Time synchronization in units at different locations | Edward Nichols, Yuji Hosoda, Thor Johnsen, Vamsi Vytla, Luis E. Depavia | 2012-05-15 |
| 7881569 | Two-channel plastic optical fiber (POF) rotary joint | Boying B. Zhang | 2011-02-01 |
| 7795872 | Determining correction factors representing effects of different portions of a lining structure | Brian Clark, Frank Morrison, Edward Nichols, Richard A. Rosthal | 2010-09-14 |
| 7792400 | Off-axis fiber optic slip ring | Boying B. Zhang | 2010-09-07 |
| 7595478 | Method and device for processing optical signals in computer mouse | — | 2009-09-29 |
| 7515782 | Two-channel, dual-mode, fiber optic rotary joint | Boying B. Zhang | 2009-04-07 |
| 7491114 | Fiber optic polisher | Boying B. Zhang | 2009-02-17 |
| 7485070 | Anti-backlash planetary gearing for optic rotary joint | Boying B. Zhang | 2009-02-03 |
| 6901180 | MEMS optical switch on a single chip and method | Nan Zhang | 2005-05-31 |
| 6801682 | Latching apparatus for a MEMS optical switch | Nan Zhang, Gary F. Nault | 2004-10-05 |
| 6459524 | Apparatus and method for sensing switching positions of a MEMS optical switch | Nan Zhang, Arden Olson | 2002-10-01 |