Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11871234 | Secure vehicle to vehicle PTC communication | Rebecca W. Dreasher, Adam Hausmann, Matthew Vrba, Edward J. Kuchar, James G. Lucas +18 more | 2024-01-09 |
| 11527151 | System and method for monitoring traffic control devices | Jerrid D. Chapman, Craig K. Green | 2022-12-13 |
| 11511782 | Control system for enforcing conditional authorities using vehicle-to-vehicle monitoring | Rebecca W. Dreasher, Ann K. Grimm, Jeffrey D. Kernwein | 2022-11-29 |
| 11176811 | System and method for monitoring traffic control devices | Jerrid D. Chapman, Craig K. Green | 2021-11-16 |
| 9457821 | Railroad signaling and communication system using a fail-safe voltage sensor to verify trackside conditions in safety-critical railroad applications | David L. Hill, Charles A. Wisniewski, Lawrence Lowe | 2016-10-04 |
| 8989926 | Railroad signaling and communication system using a fail-safe voltage sensor to verify trackside conditions in safety-critical railroad applications | David L. Hill, Lawrence Lowe, Charles A. Wisniewski | 2015-03-24 |
| 5751569 | Geographic train control | Omer Metel | 1998-05-12 |