Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6419903 | Breath freshening film | Goufeng Xu, Mel Reci, Bernie Blackwell, Richard Scott Robinson, John P. Curtis | 2002-07-16 |
| 6419906 | Strip for whitening tooth surfaces | Guofeng Xu | 2002-07-16 |