Issued Patents 1997
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5661459 | Proximity monitoring apparatus employing encoded, sequentially generated, mutually orthogonally polarized magnetic fields | — | 1997-08-26 |
| 5659325 | Low impedance loop antenna and drive circuitry | Gregory Marquardt | 1997-08-19 |
| 5640442 | Technique for determining propagating and clear frequency to be used in wide area wireless data communications network | Brendan T. Fitzgerald, Andrew T. Powshok, Jeffrey R. White, Albert D. Darby, Jr., Rodney D. Nelson | 1997-06-17 |
| 5627526 | Proximity detection using DPSK waveform | Albert D. Darby, Jr., Lamar McBryde | 1997-05-06 |