Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4876016 | Method of controlling the separation efficiency of a hydrocyclone | Grant A. Young, Steven L. Andrews | 1989-10-24 |
| 4857197 | Liquid separator with tangential drive fluid introduction | Grant A. Young, Roy D. Lister, Steven L. Andrews | 1989-08-15 |