Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6447731 | Cleaning device | Hubert Chou | 2002-09-10 |
| RE34549 | Purifying air conditioner | — | 1994-02-22 |
| 5009683 | Purifying air conditioner | — | 1991-04-23 |
| 4915108 | Hot and cold compress device | — | 1990-04-10 |
| 4883224 | Ashtray apparatus | — | 1989-11-28 |
| 4811775 | Apparatus for preventing criminal's escape or violence | — | 1989-03-14 |