Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5007364 | Gas control valves and apparatus for controlling buoyancy in water | — | 1991-04-16 |
| 4945851 | Submersible inflatable craft | — | 1990-08-07 |
| 4677931 | Variable buoyancy apparatus | — | 1987-07-07 |
| 4674429 | Underwater buoyancy apparatus | Neil C. Heesom | 1987-06-23 |
| 4527582 | Depth responsive gas control device | Neil C. Heesom | 1985-07-09 |