Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6854133 | Protective headgear for whitewater use | Chang-Ho Lee, Michael Cordeiro | 2005-02-15 |
| 6425141 | Protective helmet | James Scott Ewing, Maria Maroulis | 2002-07-30 |
| 4716849 | Erosive-jet diver tool | Virgil Johnson, Jr. | 1988-01-05 |
| 4508577 | Fluid jet apparatus and method for cleaning tubular components | William T. Lindenmuth, Gary S. Frederick | 1985-04-02 |
| 4391339 | Cavitating liquid jet assisted drill bit and method for deep-hole drilling | Virgil Johnson, Jr., T. R. Sundaram | 1983-07-05 |
| 4262757 | Cavitating liquid jet assisted drill bit and method for deep-hole drilling | Virgil Johnson, Jr., T. R. Sundaram | 1981-04-21 |