Issued Patents All Time
Showing 1–24 of 24 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11445291 | Noise-reducing earphone with adjustable voice | Wai Yin Mung, Shui Shing Choi, Ka Ming Wu | 2022-09-13 |
| 10978771 | Lumped circuit balance converter applied to double-sided parallel lines | Wai Yin Mung, Ka Ming Wu | 2021-04-13 |
| 10244328 | Moving-coil speaker | Lei Zheng, Chun Lan | 2019-03-26 |
| 9319771 | Earphone | — | 2016-04-19 |
| D746791 | Headphone | — | 2016-01-05 |
| D712872 | Headphone | — | 2014-09-09 |
| D687021 | Pair of earphones | — | 2013-07-30 |
| 7548617 | Bluetooth earphone | — | 2009-06-16 |
| D540889 | Toy radio control speed boat | — | 2007-04-17 |
| D537124 | Toy pinball game | — | 2007-02-20 |
| D534966 | Chassis for a toy automobile | — | 2007-01-09 |
| D534593 | Common chassis for toy car | — | 2007-01-02 |
| D533907 | Toy locomotive | — | 2006-12-19 |
| D528077 | Charger for model cars | — | 2006-09-12 |
| D524880 | Chassis for radio control toy car | — | 2006-07-11 |
| D524383 | Charger for toy aeroplanes | — | 2006-07-04 |
| D521572 | Chassis for radio control model car | — | 2006-05-23 |
| D520082 | Toy gun with sound and light | — | 2006-05-02 |
| D516136 | Radio controller for toy aeroplane | — | 2006-02-28 |
| D516137 | Radio controller for model car | — | 2006-02-28 |
| D513045 | Radio controller for toy car | — | 2005-12-20 |
| D508720 | Toy voice changer | — | 2005-08-23 |
| D488841 | Toy cruiser | — | 2004-04-20 |
| D488520 | Toy electronic cooking stove | — | 2004-04-13 |