Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4809519 | Methods and apparatuses for conducting solid-liquid-vapor multiple phase transformation operations | Chen-Yen Cheng, Wu Cheng | 1989-03-07 |
| 4810274 | Vacuum freezing ambient pressure melting (VFAPM) process and sub-triple point vapor processing unit for use therein | Chen-Yen Cheng | 1989-03-07 |