Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5001805 | Lubrication evacuation method | John Hayhurst | 1991-03-26 |
| 4925496 | Evacuation method for motor operated valves lubricant | John Hayhurst | 1990-05-15 |
| 4454957 | Self-locking sealing plug and installing method | Horst Kwech | 1984-06-19 |