Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10745093 | Swimming apparatus | Henrick R. Kohnen | 2020-08-18 |
| 8656853 | Sealable dome assembly | Ian Sheard | 2014-02-25 |
| 6321676 | Underwater craft having sealed and inflatable buoyancy chambers | Ian Sheard | 2001-11-27 |
| 5704309 | Hybrid boat and underwater watercraft | — | 1998-01-06 |