| 1933 O'HAGAN Railway Traffic Controlling Art |
| 1933 JOHNSTON Railway Traffic Controlling Art |
| 1933 UNION Controlling Railway Switches Art |
| 1933 KURT Time Governed Circuit Controlling Mechanism |
| 1933 UNION Time Governed Circuit Controlling Mechanism |
| 1933 RUBEL Thread Controlling Mechanism Sewing Machines |
| 1933 ROBERTS Booster Motor Controlling Mechanism |
| 1933 HODGE Time Controlling Switch Device Patent |
| 1933 STOKER Railway Switch Controlling Art |
| 1933 UNION Controlling Highway Crossing Signals |
| 1933 WEIDHAAS Curtain Controlling Means Art |
| 1933 LADDON ISAAC Controlling Means Patent Print |
| 1933 WILLIAM Time Controlling Switch Art Print |
| 1933 UNION Thread Controlling Mechanism Sewing Machines |
| 1933 UNION Railway Traffic Controlling Art |
| 1933 KEMMERER Railway Traffic Controlling Art |
| 1933 MCCANN Railway Traffic Controlling Art |
| 1933 BONE Controlling Railway Switches Art |
| 1933 FRANKLIN Booster Motor Controlling Mechanism |
| 1933 BENDIX BRAKE CO Controlling Means Patent |
| 1933 NICHOLSON Railway Traffic Controlling Art |
| 1933 WEATHERHEAD Method Producing A Controlling |
| 1933 UNION SWITCH SIGNAL CO Railway Switch Controlling |
| 1933 KAVANAUGH Controlling Device Patent Print |
| 1933 BENJAMIN Controlling Highway Crossing Signals |
| 1933 BOSSART Railway Traffic Controlling Art |
| 1933 HINES Railway Traffic Controlling Art |