Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8385178 | Multi-stage focus actuator and optical head | John Erik Hershey, Zhiyuan Ren, Xiaohong Li | 2013-02-26 |
| 8254224 | Servoing system for master with parallel tracks in a holographic replication system | Pierino Gianni Bonanni, Xiaolei Shi, Zhiyuan Ren, Hua Xia, Victor Petrovich Ostroverkhov +1 more | 2012-08-28 |