Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5845637 | Surface breathing device | — | 1998-12-08 |
| 5775323 | Regulator conversion system | — | 1998-07-07 |
| 4796467 | Testing device for respiratory protective devices | John F. Burt, Jeffrey M. Whynall, Jonathan Howe, Tavin Harnvorakiat | 1989-01-10 |