Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6931907 | Curved building panel with stress-reducing apertures | Huang Hong Yuan | 2005-08-23 |
| 6672025 | Curved building panel with stress-reducing apertures | Huang Hong Yuan | 2004-01-06 |