Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6543583 | Elevator auditing with recommended action, reason and severity in maintenance messages | Chouhwan Moon | 2003-04-08 |
| 6516923 | Elevator auditing and maintenance | Chouhwan Moon | 2003-02-11 |
| 6439350 | Differentiating elevator car door and landing door operating problems | Jun Liu, Chouhwan Moon | 2002-08-27 |
| 6330936 | Elevator behavior reported in occurrence-related groups | Harry Huang, Chouhwan Moon, Gary L. Freeland, Robert H. Mashiak | 2001-12-18 |