Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8723641 | Access control system and method for operating said system | Ling Cao, Ludwig Seitz | 2014-05-13 |
| 8482378 | Access control system and method for operating said system | Ling Cao, Ludwig Seitz | 2013-07-09 |