Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6497053 | Air diffuser used on locomotive with air dryers | Richard M. Rydzewski, David Petersen | 2002-12-24 |
| 5591907 | Weatherproof sensing apparatus with rotatable sensor | Peter J. Stein, Armen Bahlavouni, Douglas W. Andersen | 1997-01-07 |