Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4397189 | Measuring low flowrates | Steven H. Johnson, Thomas P. Grover | 1983-08-09 |
| 4381999 | Automatic ultrafiltration control system | Terry D. Boucher, Dennis J. Hlavinka, Steven H. Johnson | 1983-05-03 |