Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5197500 | Combustion chamber cleaning machine | — | 1993-03-30 |
| 5167720 | High pressure water treatment method | David Mitchell Free, Richard Henry Mace Keene | 1992-12-01 |
| 5162659 | Method and apparatus for noncontact inspection of engine blades | David Mitchell Free | 1992-11-10 |