Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5546767 | Cryogenic rectification system for producing dual purity oxygen | James R. Dray, David R. Parsnick, Theodore F. Fisher | 1996-08-20 |
| 5100446 | Crude neon production system | — | 1992-03-31 |