Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12331805 | Air spring having composite parts | Mark Trowbridge | 2025-06-17 |
| 10690208 | Composite bead plate and an air spring using the same | Mark Trowbridge, David J. Maguire | 2020-06-23 |
| 9388876 | Composite bead plate and an air spring using the same | Mark Trowbridge, David J. Maguire | 2016-07-12 |