Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9579007 | Dusting device | Ya-Ching Yang, Pai-Yung Lin | 2017-02-28 |
| 8356381 | Structure for automatically rotating a spiral rod | Ya-Ching Yang | 2013-01-22 |
| 7788759 | Standing duster article | Ya-Ching Yang | 2010-09-07 |
| 7251851 | Spiral duster | Pai-Yung Lin | 2007-08-07 |