Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 4978320 | Surface effect ship engine mount system | Robert Moore, John M. Ryken | 1990-12-18 | $13,478,000 |
| 4714443 | Flexible exhaust duct | Charles Whipple | 1987-12-22 | $3,800,000 |
| D291980 | Surface effect ship | — | 1987-09-22 | |
| 4506618 | Propeller and keel arrangement for surface effect ships | — | 1985-03-26 | $2,733,000 |
| D277657 | Surface effect ship | — | 1985-02-19 | |
| 4498873 | Surface effect ship propeller mount | Edward G. Ganczak | 1985-02-12 | $9,924,000 |
| D276986 | Surface effect ship | — | 1985-01-01 | |
| D276901 | Surface effect ship | — | 1984-12-25 |