| 1926 FLOWERS Railroad Crossing Signal Patent |
| 1926 GEORGE VERBONIC Railroad Crossing Signal |
| 1926 JOSH Railroad Crossing Signal Patent Print |
| 1926 DAVID Railroad Crossing Signal Patent Print |
| 1926 BUNKER Railroad Crossing Gate Patent Print |
| 1926 GRAVES Highway Crossing Signal System Art |
| 1926 CHARLES GRAGERT Crossing Signal Patent |
| 1926 THOMAS P MANGAN Railway Crossing Gate Art |
| 1926 FRANK Train Controlled Crossing Gate Patent |
| 1926 MCDONALD Railroad Crossing Signal Patent |
| 1926 OLSON Railway Crossing Gate Patent Print |
| 1926 ROACH Railway Crossing Gate Mechanism Art |
| 1926 BERNARD Railroad Crossing Gate Patent Print |
| 1926 JEREMIAH ANDY Crossing Gate Patent Print |
| 1926 ALONZO Railroad Crossing Gate Patent Print |
| 1926 THOMAS Railroad Crossing Signal Patent |
| 1926 HANKS Railway Crossing Gate Patent Print |
| 1926 JOSEPH Automatic Railway Crossing Gate Art |
| 1926 BRADFORD Signaling Railroad Crossing Gates |
| 1926 FREDRICK Railway Crossing Gate Patent Print |
| 1926 GRAVES Highway Crossing Signal Patent Print |
| 1926 STEVE Railway Crossing Gate Patent Print |
| 1926 LEE Railroad Crossing Signal Patent Print |
| 1926 GEORGE Crossing Safety Signal Patent Print |
| 1926 "Grade Crossing Problem Solved..." Pennsylvania RR |