Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4887639 | Non-degrading pressure regulator | Richard Lewis, James P. Korzenowski | 1989-12-19 |
| 4867653 | Diaphragm pump | John B. Mills, Vicky J. Peterson, Roger Young, C. Jeremy Crouch, Roman A. Schulz +1 more | 1989-09-19 |