Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4495152 | Leach apparatus including means to protect ion exchange resin | Tsoung Y. Yan | 1985-01-22 |
| 4298578 | Leach method including means to protect ion exchange resin | Tsoung Y. Yan | 1981-11-03 |