Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5381751 | Transportation and discharge of waste to abyssal depths | William R. Richards, John A. Wilkes, Brian K. Schwatka, Andrew Resnick | 1995-01-17 |
| 4648345 | Propeller system with electronically controlled cyclic and collective blade pitch | John L. Wham, Frederick R. Haselton | 1987-03-10 |