Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7300118 | Electronic park brake valve system for air brakes vehicles | Joe Hoover, Robert Rudolph, David G. Engelbert | 2007-11-27 |
| 6685281 | Parking brake control system | G. David MacGregor | 2004-02-03 |
| 6450587 | Vehicle brake safety system apparatus and methods | G. David MacGregor, Dale Maslonka | 2002-09-17 |
| 6322161 | Apparatus and methods for automatic engagement and locking of vehicle air parking brake | Dale Maslonka, G. David MacGregor | 2001-11-27 |
| 4533609 | Seal for electrochemical cell | Arabinda N. Dey | 1985-08-06 |
| 4458411 | Method of fabricating an extremely high rate flat cell | Arabinda N. Dey | 1984-07-10 |
| 4401732 | Fluid cathode depolarized cell | — | 1983-08-30 |
| 4356240 | Extremely high rate flat cell | Arabinda N. Dey | 1982-10-26 |