Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5666825 | Process and installation for the separation of air | Bernard Darredeau, Jean-Yves Lehman | 1997-09-16 |
| 5592834 | Process and installation for the separation of air | Bernard Darredeau, Jean-Yves Lehman | 1997-01-14 |