Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D1095882 | Flattening rotor | Lei Guo, Nan Zhao | 2025-09-30 |
| D1064311 | Centrifuge | Lei Guo, Nan Zhao | 2025-02-25 |
| 8136696 | Lottery ticket machine able to prevent tickets from being illegally drawn out | Yun-Lan Cheng | 2012-03-20 |
| 6053358 | Lottery machine preventing lotteries from pulling out illegally | — | 2000-04-25 |
| 6036052 | Roller mechanism for a lottery ticket machine | — | 2000-03-14 |