Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6766396 | PC16550D UART line status register data ready bit filter and latch | — | 2004-07-20 |
| 6382362 | Optical monitoring system for hoistway door interlocks | — | 2002-05-07 |
| 5746399 | Car space measurement apparatus | Kenneth P. Ehrlich, Edmund C. Nowakowski | 1998-05-05 |
| 4932502 | Hydraulic elevator system | Jeffrey W. Blain | 1990-06-12 |