Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5947442 | Solenoid actuated valve assembly | Rodney M. Shurman, Edward B. Manring, Chafic Hammoud, George L. Muntean | 1999-09-07 |
| RE32997 | Electric control valve | Gregory J. Krawczyk | 1989-07-25 |
| 4460015 | Three-way control valve | Gregory J. Krawczyk | 1984-07-17 |
| 4458715 | Solenoid actuated control valve | Gregory J. Krawczyk | 1984-07-10 |
| 4431160 | Electric control valve | Gregory J. Krawczyk | 1984-02-14 |