Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5392879 | Electronic failure detection system | Michael Spaner | 1995-02-28 |
| 5357064 | Elevator hall call cross-cancellation device | Brian D. Ellsworth, David M. Hughes, Bertram F. Kupersmith, Paul A. Stranieri | 1994-10-18 |