Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4869102 | Method and apparatus for remote monitoring of valves and valve operators | Thomas A. Rak, Duane H. Rowicki, Chin P. Ho | 1989-09-26 |
| 4831873 | Method and apparatus for remote monitoring of valves and valve operators | Arthur G. Charbonneau, Edmond A. Sayed | 1989-05-23 |