Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7712587 | Elevator system and method of monitoring elevators by using a virtual elevator group | Sung Sub Kim, Ki Hyun Nam | 2010-05-11 |
| 6000504 | Group management control method for elevator | Eung-Lyeol Koh, Jeong-Oh Kim | 1999-12-14 |