Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4785915 | Elevator system monitoring cold oil | Richard Thomas | 1988-11-22 |
| 4766978 | Elevator system adaptive time-based block operation | Jeffrey W. Blain | 1988-08-30 |
| 4765442 | Elevator system graceful degradation of bank service | Jeffrey W. Blain, Jean-Huang Chen | 1988-08-23 |