Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4191588 | Method of cleaning fouled heat exchangers and other equipment | Donald A. Keyworth | 1980-03-04 |
| 4181536 | Process for the cleaning of fouled heat exchangers and other equipment | Donald A. Keyworth | 1980-01-01 |