Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12280986 | Elevator door sensor arrangement | — | 2025-04-22 |
| 11912531 | Elevator door sensor arrangement | — | 2024-02-27 |
| 11788442 | Engine valve actuation | Roger Stone, Richard Tyrrell | 2023-10-17 |
| 11454143 | Engine valve actuation | Roger Stone, Richard Tyrrell | 2022-09-27 |
| 10954827 | Desmodromic valve train | Roger Stone, Owen Evans, Richard Tyrrell | 2021-03-23 |
| 10647265 | Switch mechanism for an electrically adjusted screen mount | David Alan Rook | 2020-05-12 |
| 4742196 | Elongate pressure-actuated electrical switch | — | 1988-05-03 |