Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6212959 | Hydration insuring system comprising liquid-flow meter | — | 2001-04-10 |
| 5650103 | Increased efficiency method for lining a pipe with a cement mortar | Alfred G. Perkins | 1997-07-22 |
| 5443377 | Increased efficiency apparatus for lining a pipe with a cement mortar | Alfred G. Perkins | 1995-08-22 |
| 5305612 | Cryopump method and apparatus | Graham J. Higham | 1994-04-26 |
| 5246641 | Method for lining a pipe with a cement mortar | Alfred G. Perkins | 1993-09-21 |