| 1938 UNION Control Highway Crossing Signals Art |
| 1938 WILLING Highway Crossing Signaling System |
| 1938 MACKEY Highway Crossing Signaling System |
| 1938 STOKER Control Highway Crossing Signals |
| 1938 LAY Control Highway Crossing Signals Art |
| 1938 BENJAMIN Control Highway Crossing Signals |
| 1938 PFLASTERER Controlling Highway Crossing Signals |
| 1938 REICHARD Highway Crossing Signaling System |
| 1938 HAINES Highway Crossing Signal Railways Art |
| 1938 UNION Controlling Highway Crossing Signals |
| 1938 HAWES Crossing Gate Structure Patent Print |
| 1938 GEN Highway Crossing Signaling System Art |
| 1938 ASSOCIATED Crossing Gate Structure Art |
| 1938 FIELD Highway Crossing Signaling System Art |
| 1938 GILMORE Railroad Crossing Gate Patent Print |
| 1938 CLAUS Controlling Highway Crossing Signals |
| 1938 WESTERN Controlling A Waving Crossing Signal |
| 1938 UNION Highway Crossing Signal Railways Art |
| 1938 WALTER Controlling A Waving Crossing Signal |
| 1938 GEN Highway Crossing Signal System Art |
| 1938 DORSCHEL Highway Crossing Signal System Art |