Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4544873 | Elevator polyphase motor control | James J. Duckworth | 1985-10-01 |
| 4533862 | Polyphase motor drive imbalance detection | — | 1985-08-06 |
| 4501343 | Elevator car load and position dynamic gain compensation | — | 1985-02-26 |
| 4483419 | Elevator motoring and regenerating dynamic gain compensation | Leca Boiucaner | 1984-11-20 |
| 4484127 | Inverter power transistor protection | Leca Boiucaner | 1984-11-20 |
| 4456097 | Elevator battery charging control | — | 1984-06-26 |