Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11946284 | Door lock capable of showing locking or unlocking state | Chung-Liang Lin, Roger Keith Russell | 2024-04-02 |
| 11624208 | Door lock having a lighted display when in the locked position | Roger Keith Russell, Chung-Liang Lin | 2023-04-11 |
| 5116170 | Drill jig for preparing a door to receive a cylindrical lock | Ralph P. Palmer, David A. Whitmoyer | 1992-05-26 |