Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6952086 | Linear position sensing system and coil switching methods for closed-loop control of large linear induction motor systems | Mark P. Krefta, David Hall, Jiing-Liang Wu, Robert E. Strickler, Michael B. Brennen | 2005-10-04 |
| 5305234 | Thermal protection apparatus for a synchronous machine | David R. Markus, Donald S. Kimmel, Gerhard K. Kasprowicz, Robert S. Murray | 1994-04-19 |
| 5264778 | Apparatus protecting a synchronous machine from under excitation | Donald S. Kimmel, Charles R. Mummert, David R. Markus | 1993-11-23 |
| 4698780 | Method of monitoring an elevator system | Alan F. Mandel, William J. Trosky, William H. Moore | 1987-10-06 |
| 4646058 | Elevator system with lamp failure monitoring | Alan F. Mandel, William H. Moore | 1987-02-24 |
| 4512442 | Method and apparatus for improving the servicing of an elevator system | William H. Moore, Alan F. Mandel, William J. Trosky, Stephen Tomas, Edward Tober +1 more | 1985-04-23 |
| 4418795 | Elevator servicing methods and apparatus | William J. Trosky, Alan F. Mandel, William H. Moore | 1983-12-06 |
| 4400786 | Elevator system with speech synthesizer for audible information | Alan F. Mandel, Douglas A. Bauman | 1983-08-23 |
| 4400787 | Elevator system with speech synthesizer for repetition of messages | Alan F. Mandel | 1983-08-23 |
| 4248327 | Elevator system | Alan F. Mandel, Louis M. Capuano, Paul Otto | 1981-02-03 |