Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5198823 | Passive secondary surveillance radar using signals of remote SSR and multiple antennas switched in synchronism with rotation of SSR beam | John Robert Keller | 1993-03-30 |
| 5196856 | Passive SSR system utilizing P3 and P2 pulses for synchronizing measurements of TOA data | Burton L. Hulland | 1993-03-23 |
| 5140328 | Virtual secondary surveillance radar using signals of remote SSR | Burton L. Hulland | 1992-08-18 |
| 4899156 | Virtual ATCRBS using signals of remote SSR | Burton L. Hulland | 1990-02-06 |
| 4789865 | Collision avoidance system | — | 1988-12-06 |
| 4768036 | Collision avoidance system | Burton L. Hulland | 1988-08-30 |
| 4733241 | Position finding and collision avoidance system | Burton L. Hulland | 1988-03-22 |
| 4642648 | Simple passive/active proximity warning system | Burton L. Hulland | 1987-02-10 |
| 4486755 | Collision avoidance system | Burton L. Hulland | 1984-12-04 |
| 4191958 | Radiolocation with respect to an Own station, using Omega signals or the like | Burton L. Hulland | 1980-03-04 |