Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5387769 | Local area network between an elevator system building controller, group controller and car controller, using redundant communication links | Bertram F. Kupersmith, Venkataramana S. Pullela | 1995-02-07 |
| 5308943 | Convertible hybrid touch button switch | Bruce P. Swaybill | 1994-05-03 |