Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9056511 | Method and apparatus for calibrating spot color | Haifeng Li, Xueyan Yan | 2015-06-16 |
| 8876250 | Method and device for measuring total amount of ink in ink-jet printing apparatus | Haifeng Li, Yanman Ma | 2014-11-04 |