Issued Patents 2025
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12420848 | Methods and systems for achieving vital ultra-wideband (UWB) based train control | Richard C. Carlson, John Albert Plutt, Jr. | 2025-09-23 |
| 12397832 | Rail vehicle signal enforcement and separation control | Richard C. Carlson, Marc W. Cygnus | 2025-08-26 |
| 12379479 | Methods and systems for ultra-wideband (UWB) based subway personnel detection | — | 2025-08-05 |
| 12258058 | Rail vehicle signal enforcement and separation control | Richard C. Carlson, Marc W. Cygnus | 2025-03-25 |