Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5956856 | Drawing board assembly | Chiang-Wen Chen | 1999-09-28 |
| 5386640 | Drafting device | Kun Chen | 1995-02-07 |
| 5343625 | Portable magnetic drafting board | Kun Chen | 1994-09-06 |
| 5187873 | Students multi-function protractor | Bill C. B. Jeng | 1993-02-23 |