Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5909182 | Vandal resistant light signal unit | Daniel W. Van Alstine, Mark Hager | 1999-06-01 |
| 5433166 | Railway light signal | Kenton H. Barker, Ronald W. Dinger, James M. Martin | 1995-07-18 |