Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6477860 | Process for obtaining gaseous and liquid nitrogen with a variable proportion of liquid product | Dietrich Rottmann | 2002-11-12 |
| 6470707 | Process for obtaining gaseous nitrogen | Dietrich Rottmann | 2002-10-29 |