Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7533503 | Knockdown doorframe for adjustably accommodating wall thickness and building method thereof | — | 2009-05-19 |
| 6192638 | Knockdown doorframe and building method thereof | — | 2001-02-27 |
| 5500104 | Mono-polar pre-filter electrolyzer with vertical power-supply rods | — | 1996-03-19 |
| 5016414 | Imitated carved wooden door having three-dimensional panel structure | — | 1991-05-21 |