| 1924 RODESS SAMUEL Signal Bell Patent Print Art |
| 1924 FRED Crank Base Railway Signal Art Print |
| 1924 CENTRAL RAILWAY SIGNAL Flare Light Art |
| 1924 LYNDON GRIFFIN Signal Buoy Patent Print Art |
| 1924 LYNDON Signal Buoy Patent Print Art |
| 1924 FERGUSSON Toy Signal Tower Patent Print Art |
| 1924 BAY JOHN Bridge Signal Patent Print Art |
| 1924 CARL MARX Theft Signal Patent Print Art |
| 1924 CONTOIS Block Signal Protective Device Art |
| 1924 HENRY Stop Signal For Railway Crossings Art |
| 1924 JOSEPH GROSS Bridge Signal Patent Print Art |
| 1924 WADKINS HARVEY Signal Patent Print Art |
| 1924 HOLTZERCABOT ELECTRIC Electric Signal Art |
| 1924 VINCENT Automatic Grade Crossing Signal Art |
| 1924 RODESS SAMUEL Signal Horn Patent Print Art |
| 1924 BROWN NEIL Water Signal Patent Print Art |
| 1924 SIGNAL GMBH Sound Producer Patent Print Art |
| 1924 PHILLIPS Railway Crossing Alarm Signal Art |
| 1924 V B PIRCE Crossing Signal Patent Print Art |
| 1924 HURD LAURA Signal Patent Print Art |
| 1924 CHADWICK Theft Warning Signal Vehicles Art |