| 1936 GEN RAILWAY SIGNAL CO Signaling System Railroads |
| 1936 O'MEARA THOMAS Light Signal Patent Print |
| 1936 COLEMAN WILLIAM Railroad Signal Patent |
| 1936 UNION SWITCH SIGNAL CO Railway Signaling |
| 1936 GEN MOTORS CORP Sound Signal Patent Print |
| 1936 GEORGE E BUTLER Automobile Distress Signal |
| 1936 LINTERN Ventilator Signal Unit EVANS Patent 49104 |
| 1936 UNION SWITCH & SIGNAL CO Light Signal Art |
| 1936 HARRISON Audible Signal Device Patent Print |
| 1936 BALZER Electrically Operated Signal Patent |
| 1936 GILLET Reed Actuated Signal Patent Print |
| 1936 LOWELL Automatic Cab Signal System Art |
| 1936 SUBMARINE SIGNAL CO Oscillator Mounting Art |
| 1936 GOSLING Traffic Signal Casing GENERAL Patent 49123 |
| 1936 JUBILEE MFG CO Reed Actuated Signal Patent |
| 1936 UNION SWITCH SIGNAL CO Light Responsive |
| 1936 CHINSKY Signal Light Casing Holder Patent 49127 |
| 1936 CRITCHFIELD ROBERT Sound Signal Patent |
| 1936 BISSELL Traffic Signal Casing CROUSE Patent 49131 |
| 1936 LAYTON Light Signal Mounting Means Patent |
| 1936 UNION SWITCH SIGNAL CO Signaling Art Print |
| 1936 WALTHAM WATCH Electrically Operated Signal |
| 1936 ANGELO L BOTT Foul Line Signal Patent Print |
| 1936 LOUIS Signal System Toy Railroad Trains Art |
| 1936 ROBERT R WOOTEN Signal Patent Print Art |
| 1936 TOLD ARNOLD Railroad Signal Patent Print |
| 1936 OSBRINK Vehicles Signal Reflector Patent 49094 |
| 1936 CARL Audible Electric Signal Patent Print |
| 1936 PIPKIN Audible Signal Device Patent Print |
| 1936 CARROLL Railroad Crossing Signal Patent |
| 1936 UNION SWITCH SIGNAL CO Railway Switch Operating |
| 1936 DE Automobile Distress Signal Patent Print |
| 1936 UNION SWITCH SIGNAL CO Power Limiting Art |
| 1936 THEODORE Automatic Cab Signal System Patent |
| 1936 FRANCISCO TOSCANO Electric Signal Patent |
| 1936 SUBMARINE SIGNAL CO Measuring Depths Art |
| 1936 BONE HERBERT Smashboard Signal Patent Print |
| 1936 GILLET Warning Signal Generator Patent |
| 1936 UNION SWITCH SIGNAL CO Remote Control Art |
| 1936 HEWITT Signal Valve Device Patent Print Art |
| 1936 UNION SWITCH SIGNAL CO Railway Braking Art |
| 1936 SIGNOR Electric Flare Signal Patent Print |
| 1936 CHICAGO RAILWAY EQUIPMENT CO Railroad Signal |
| 1936 WILLIAMS Signal Means For Rail Cars Patent |
| 1936 KING Signal Indicator Railroad Vehicles Art |
| 1936 CLARK TRUCTRACTOR Signal Means Rail Cars |
| 1936 UNION SWITCH & SIGNAL CO Track Circuit Art |
| 1936 UNION SWITCH SIGNAL CO Smashboard Signal |
| 1936 UNION SWITCH SIGNAL CO Track Shunting Art |
| 1936 WESTINGHOUSE AIR BRAKE CO Signal Valve Art |
| 1936 HESTER LORING Signal ROBERT R WOOTEN Patent |
| 1936 UNION SWITCH SIGNAL CO Railway Track Circuit |
| 1936 SECO MFG COMPANY Electric Flare Signal Art |
| 1936 UNION SWITCH SIGNAL CO Railway Signaling System |
| 1936 GEN RAILWAY SIGNAL CO Light Signal Mounting Means |
| 1936 GEN RAILWAY SIGNAL CO Lock Railway Spring Switches |
| 1936 WILEY BERGMAN Signal Patent Print Art |
| 1936 EMIL YANNES Foul Line Signal Patent Print |
| 1936 E A LAB INC Warning Signal Generator Patent |