Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4815568 | Weighted relative system response elevator car assignment system with variable bonuses and penalties | — | 1989-03-28 |
| 4804069 | Contiguous floor channeling elevator dispatching | Kandasamy Thangavelu | 1989-02-14 |