Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8218458 | Method and apparatus for voice conference monitoring | Choon B. Shim, Liehua Xie | 2012-07-10 |
| 4605495 | Hydrocyclone separator apparatus | — | 1986-08-12 |
| 4512888 | Apparatus for removal by flotation of solid particles from liquid | — | 1985-04-23 |