Issued Patents 1997
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5697584 | Railroad searchlight signal with solid state illuminant and aspect indication | — | 1997-12-16 |
| 5664744 | Railway highway crossing signal | Santo A. DeFrancesco, Richard S. Jones | 1997-09-09 |
| 5639047 | Railroad signal with remote light source | Paul J. Boget | 1997-06-17 |
| 5598992 | Railway switch circuit controller | — | 1997-02-04 |