Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9373235 | System and method for storing and monitoring events at security devices | Tianfeng Zhao, Richard A. Smith, Kevin G. Piel, Kenneth L. Addy | 2016-06-21 |
| 8982360 | Apparatus and method of using a light conduit in a position detector | Tianfeng Zhao, Paul M. Popowski, Guenter Watzlawik | 2015-03-17 |