Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4836989 | Distribution system for downflow reactors | Richard G. Graven, David W. Lewis | 1989-06-06 |
| 4810428 | High efficiency radial type vapor distributor for packed towers | Simon Yeung | 1989-03-07 |