Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5909182 | Vandal resistant light signal unit | David A. Donatello, Mark Hager | 1999-06-01 |
| 5669587 | Point detection and indication with latch out means | George E. Ludwick, George A. Bonner, Mark Hager, Charles M. Eggebrecht, Allen Baughman +1 more | 1997-09-23 |
| 5590857 | Trailing device for a railroad switch layout | Harry A. Albrecht | 1997-01-07 |
| 5586737 | Switch machine cam bar | Charles M. Eggebrecht | 1996-12-24 |
| 5582370 | Switch machine with ratchet mechanism on hand throw mechanism | Steven Wayne Myers | 1996-12-10 |