Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5613374 | Process for the low temperature separation of air and air separation installation | Wilhelm Rohde | 1997-03-25 |
| 5592833 | Process and apparatus for the recovery of pure argon | — | 1997-01-14 |