Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6052864 | Vacuum cleaner with retractable handle | — | 2000-04-25 |
| D414905 | Vacuum cleaner | — | 1999-10-05 |
| D392293 | Hand-held electric sewing machine | Shi-chour Tsay | 1998-03-17 |
| 5669318 | Portable lock stitch sewing machine | Shi-chour Tsay | 1997-09-23 |
| D383578 | Combined electric broom and vacuum cleaner | — | 1997-09-09 |