Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9706889 | Dirt cup latch mechanism for vacuum cleaner | Wai Man Lee, Yu Xiaoming | 2017-07-18 |
| 8640301 | Dirt cup latch mechanism for vacuum cleaner | Wai Man Lee, Yu Xiaoming | 2014-02-04 |