Issued Patents 2004
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6691538 | Enhanced door lock capable of being locked from inner side of doorplate | Chen Yang, Sheng Chu Yang | 2004-02-17 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6691538 | Enhanced door lock capable of being locked from inner side of doorplate | Chen Yang, Sheng Chu Yang | 2004-02-17 |