Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7711511 | Method and apparatus for automatically testing a railroad interlocking | Joseph C. Winkler, Paul Galburt, Donald P. Crosby, David Rayna, George T. Briechle | 2010-05-04 |
| 7363187 | Method and apparatus for automatically testing a railroad interlocking | Joseph C. Winkler, Paul Galburt, Donald P. Crosby, David Rayna, George T. Briechle | 2008-04-22 |