Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9815664 | Stranger prevention for elevator destination entry system | Jinglong Zhang | 2017-11-14 |
| 9296591 | Determining elevator car position using bi-stable sensors | Michael Garfinkel, Ronnie E. Thebeau, Leslie C. Watterson, Sucheol Lee | 2016-03-29 |