Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5365744 | Air conditioning and refrigeration systems utilizing a cryogen | Herman H. Viegas, Roland L. Roehrich | 1994-11-22 |
| 5320167 | Air conditioning and refrigeration systems utilizing a cryogen and heat pipes | Roland L. Roehrich, Herman H. Viegas | 1994-06-14 |