| 1938 POWELL Railway Traffic Controlling System |
| 1938 WALLACE TIERNAN INC Circuit Controlling Mechanism |
| 1938 WALLACE Circuit Controlling Mechanism Art |
| 1938 UNION Railway Traffic Controlling Art |
| 1938 THOMPSON Railway Traffic Controlling Art |
| 1938 ARTHUR Controlling Load Opening In Boxcars Like |
| 1938 STAPLES Railway Traffic Controlling Art |
| 1938 HERMANN Bobbin Case Controlling Device Art |
| 1938 YOUNG Railway Traffic Controlling Art |
| 1938 SINGER CO Thread Controlling Sewing Machines |
| 1938 GILBERT Railway Traffic Controlling Art |
| 1938 UNION SWITCH SIGNAL CO Railway Switch Controlling |
| 1938 LEO Controlling Load Opening In Boxcars Like |
| 1938 AUTOMOTIVE PROD LTD Hydraulic Controlling |
| 1938 PFLASTERER Controlling Highway Crossing Signals |
| 1938 GEN Railway Traffic Controlling System Art |
| 1938 PHINNEY Railway Traffic Controlling System |
| 1938 HINES Railway Switch Controlling Art Print |
| 1938 BURRELL Means Laterally Controlling Aircraft |
| 1938 UNION Controlling Highway Crossing Signals |
| 1938 YARBROUGH Railway Traffic Controlling Art |
| 1938 LAY Railway Traffic Controlling Art Print |
| 1938 CLAUS Controlling Highway Crossing Signals |
| 1938 SYDNEY Thread Controlling Sewing Machines |
| 1938 DUERKOPPWERKE Bobbin Case Controlling Art |
| 1938 AGNEW Railway Switch Controlling Art Print |
| 1938 WESTERN Controlling A Waving Crossing Signal |
| 1938 WALTER Controlling A Waving Crossing Signal |