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 | Arthur G. Charbonneau, John A. McMennamy | 1989-08-29 |
| 4852416 | Ultrasonic testing system with variable angle transducer mount | Bruce T. Boone, Thomas A. Rak, John A. McMennamy | 1989-08-01 |