Issued Patents All Time
Showing 26–29 of 29 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5690139 | Valve construction | Garland Y. Smith, Anthony S. Zummer | 1997-11-25 |
| 5321233 | Electrofusion fitting and sealing method for distribution line | Robert E. Barrett | 1994-06-14 |
| 5186199 | Conduit stopper | Garland Y. Smith | 1993-02-16 |
| 4224795 | Method for converting heat energy to mechanical energy with monochlorotetrafluoroethane | Leonard I. Stiel, Robert A. Allen | 1980-09-30 |