Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7510143 | Wing assembly and aircraft | William D. Bertelsen | 2009-03-31 |
| 6715574 | Airstream control system for a hovercraft | John Grant | 2004-04-06 |
| 4778019 | Dynamic seals for vehicle air suspensions | — | 1988-10-18 |
| 4530545 | Segmented air-track apparatus | — | 1985-07-23 |
| 4415131 | Arc wing aircraft | William D. Bertelsen | 1983-11-15 |
| 4283094 | Air suspension system for vehicle track | — | 1981-08-11 |