Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D811580 | Unidirectional valve for face mask | Ee Ho Tang, Kwok Jiang Sak | 2018-02-27 |
| D760380 | Child active venting system for disposable respirator | Ee Ho Tang, Kwok Jiang Sak | 2016-06-28 |
| 7602239 | Variable gain amplifier circuits | Chih-Chien Huang, Chien-Ming Chen | 2009-10-13 |