Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12212296 | Power noise suppression circuit and machine equipment using the same | — | 2025-01-28 |
| 12014717 | Active noise cancelling cord | — | 2024-06-18 |
| 11946284 | Door lock capable of showing locking or unlocking state | Roger Keith Russell, Mark A. Shumaker | 2024-04-02 |
| 11624208 | Door lock having a lighted display when in the locked position | Mark A. Shumaker, Roger Keith Russell | 2023-04-11 |
| 9140032 | Door lock | — | 2015-09-22 |
| 8355010 | Load cell touch control device | Chang-Chun Lung, Pi-Lieh Chang, Tsung-Hsin Liu, Ta-Jen Lin, Ko-Po Lin +1 more | 2013-01-15 |
| 8266934 | Keyed cylinder assembly for door lock | — | 2012-09-18 |
| 8082695 | Mullion assembly for double door | — | 2011-12-27 |
| 8079178 | Mullion assembly for double door | — | 2011-12-20 |
| 8069612 | Mullion assembly for double door | — | 2011-12-06 |
| 8069613 | Mullion assembly for double door | — | 2011-12-06 |
| 7836737 | Lock for pivotal doors and sliding doors | — | 2010-11-23 |
| 7377140 | Lock with clutching function | Mu-Lin Shen | 2008-05-27 |
| 7253278 | Purification process for manufacturing a high pure acarbose | Tung-Li Huang, Jeen-Kuan Chen, Chi-Sheng Wu | 2007-08-07 |