Issued Patents All Time
Showing 1–25 of 50 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7918190 | Electronic animal containment system with direction of approach determination | Christopher E. Mainini | 2011-04-05 |
| 7377234 | Portable animal tracking system | — | 2008-05-27 |
| 7212563 | Real-time locating system and method using timing signal | Robert W. Boyd, Michael A. Wohl, David S. Wisherd | 2007-05-01 |
| 6987744 | Wireless local area network with geo-location capability | Timothy C. Harrington, Robert W. Boyd, David S. Wisherd | 2006-01-17 |
| 6892054 | Interference suppression for wireless local area network and location system | Robert W. Boyd, Michael A. Wohl | 2005-05-10 |
| 6859485 | Geolocation system with controllable tags enabled by wireless communications to the tags | — | 2005-02-22 |
| 6853687 | Proximity-based magnetic field generator for controlling operation of RF burst-transmitting tags of geolocation system | Timothy C. Harrington, Ronald J. Hash | 2005-02-08 |
| 6812839 | Use of rotating magnetic field to enhance communication with RF burst-transmitting tags of object location system | Ronald J. Hash | 2004-11-02 |
| 6721369 | Composite BPSK/AM-BPSK based spectral suppression of out-of-band energy from saturated RF amplifier | Ronald J. Hash | 2004-04-13 |
| 6593885 | Low cost DTOA location processing system based on multiple readers-to-single processor architecture | David S. Wisherd | 2003-07-15 |
| 6476719 | Ultra-sensitive magnetic field receiver capable of operating in high noise environments | John A. Eisenberg, Ronald J. Hash, Douglas Bowman | 2002-11-05 |
| 6393045 | Spread spectrum baseband modulation of magnetic fields for communications and proximity sensing | Ronald J. Hash, Robert W. Boyd | 2002-05-21 |
| 6380894 | Multi-lateration system with automatic calibration and error removal | Robert W. Boyd, Michael A. Wohl | 2002-04-30 |
| 6366242 | Computer workstation tool for displaying performance estimate of tagged object geo-location system for proposed geometry layout of tag transmission readers | Robert W. Boyd, David J. Stryker | 2002-04-02 |
| 6268723 | Magnetic field emission and differential receiver coil configuration for discriminating response magnetic field from transponder tag | Ronald J. Hash, Robert W. Boyd | 2001-07-31 |
| 6170748 | Object identification system employing pulsed magnetic field-stimulated, tag-embedded transponder | Ronald J. Hash, Robert W. Boyd | 2001-01-09 |
| 6127976 | Distributed network for multi-lateration with circularly polarized antenna for hemispherical coverage | Robert W. Boyd, David J. Stryker, Ronald J. Hash, Michael A. Wohl, Timothy C. Harrington | 2000-10-03 |
| 6121926 | Radio geo-location system with advanced first received wavefront arrival determination | Robert W. Boyd, Michael A. Wohl | 2000-09-19 |
| 6072375 | Waveguide with edge grounding | Calvin L. Adkins | 2000-06-06 |
| 6029285 | Adaptive compensation of RF amplifier distortion by injecting predistortion signal derived from respectively different functions of input signal amplitude | Michael A. Wohl, Kent E. Bagwell | 2000-02-29 |
| 5995046 | Radio geo-location system with advanced first received wavefront arrival determination | Robert W. Boyd, Michael A. Wohl | 1999-11-30 |
| 5940045 | Optimization of DC power to effective irradiated power conversion efficiency for helical antenna | William D. Killen | 1999-08-17 |
| 5920287 | Radio location system for precisely tracking objects by RF transceiver tags which randomly and repetitively emit wideband identification signals | John A. Eisenberg, David S. Wisherd | 1999-07-06 |
| 5892397 | Adaptive compensation of RF amplifier distortion by injecting predistortion signal derived from respectively different functions of input signal amplitude | Michael A. Wohl, Kent E. Bagwell | 1999-04-06 |
| 5789927 | Baseband measurement of RF power amplifier distortion | — | 1998-08-04 |