Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12208886 | Axially biased nonintegral raceways for rotorcraft masts | Charles Hubert Speller, Nathan D. Sudek | 2025-01-28 |
| 11940042 | Gearbox self contained breathing system | Charles Hubert Speller | 2024-03-26 |
| 11408484 | Apparatus and method for assembling double helical planetary system | Gregory Alan Spruce, Douglas Robert Mueller | 2022-08-09 |
| 11041525 | Mast bearing race | Douglas Robert Mueller, Gregory Alan Spruce | 2021-06-22 |