Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4860596 | Motor operated valve analysis and testing system with monitoring of spring pack movement through torque switch post | John A. McMennamy, Steven Nafziger | 1989-08-29 |
| 4831873 | Method and apparatus for remote monitoring of valves and valve operators | Stanley N. Hale, Edmond A. Sayed | 1989-05-23 |