Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5304757 | Combination differential and static pressure switch | — | 1994-04-19 |
| 5295392 | Pipe testing equipment | Mark F. Hensel, Steve D. Sandstrum, John Coleman, John H. Parnell, Stephen J. Boros | 1994-03-22 |