Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8671990 | Vacuum valve apparatus and method | William W. Griffith, Ronald Flanary, Jeffrey S. Terrell, Kenneth Sowers | 2014-03-18 |
| 6979181 | Method for controlling the motor of a pump involving the determination and synchronization of the point of maximum torque with a table of values used to efficiently drive the motor | — | 2005-12-27 |