Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7159603 | Mechanical hot tapping method | Ralph E. King | 2007-01-09 |
| 5670026 | In-service cleaning of columns | — | 1997-09-23 |
| 5512140 | In-service cleaning of columns | — | 1996-04-30 |
| 5509435 | Non-leaking valve | Jack D. Sumrall, Anthony L. Alex | 1996-04-23 |