Issued Patents 2019
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D844556 | Battery | Ritha Chan, Xiyin Yao, Benjamin Shrader | 2019-04-02 |
| D844264 | Handheld vacuum cleaner | Ritha Chan, Xiyin Yao, Yuen Yeuk Au Alvin, Cheung Chun Kit Benson | 2019-03-26 |
| D838067 | Handheld vacuum cleaner | Ritha Chan, Xiyin Yao, Yuen Yeuk Au Alvin, Cheung Chun Kit Benson | 2019-01-08 |