Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5242136 | Railway signalling systems | Alan H. Cribbens | 1993-09-07 |
| 5055835 | Track to train communication systems | — | 1991-10-08 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5242136 | Railway signalling systems | Alan H. Cribbens | 1993-09-07 |
| 5055835 | Track to train communication systems | — | 1991-10-08 |