Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6390382 | Rail fixings | John Barry Clarke, David L. Farrington, David John Thompson, Christopher Jones | 2002-05-21 |
| 5011077 | Railways | Colin G. Stanworth, David John Thompson | 1991-04-30 |
| 4728030 | Railway sleeper with spade-like end contours | — | 1988-03-01 |