Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4822394 | Method and apparatus for the production and liquefaction of gases | Joseph E. Zeigler | 1989-04-18 |
| 4803054 | Asymmetric heat-exchange reaction apparatus for effecting chemical reactions | Dean Sillerud | 1989-02-07 |