| 1949 BRONSON Coupler Operating Device Patent |
| 1949 STANDARD Car Coupler Operating Art Print |
| 1949 EVA E BLYTHE Railway Track Switch Operating Means |
| 1949 BRONSON Car Coupler Operating Device Patent |
| 1949 UNION SWITCH SIGNAL CO Railway Switch Operating |
| 1949 HANS Operating Internal Combustion Engines |
| 1949 ZIMMER Door Operating Mechanism Dump Cars |
| 1949 ENTPR Dump Car Door Operating Mechanism Art |
| 1949 STANDARD RAILWAY EQUIPMENT MFG Coupler Operating |
| 1949 HARRIS Operating Controlling Dry Dock Side Walls |
| 1949 BIYTHE Railway Track Switch Operating Means |
| 1949 CLARK Toy Machine Gun Operating Mechanism |
| 1949 ENTPR Door Operating Mechanism Dump Cars |
| 1949 BAUGHMAN Railway Switch Operating Art |
| 1949 BATHO Door Operating Mechanism Dump Cars |
| 1949 KORDISH Door Operating Mechanism Dump Cars |
| 1949 SIMPSON Operating Spring Retainer Firearms |
| 1949 OLIVER Door Operating Mechanism Dump Cars |
| 1949 ZIMMER Dump Car Door Operating Mechanism |
| 1949 GREEN Bolt Operating Mechanism Repeating Shotguns |
| 1949 RATAICZAK Operating Mechanism Machine Guns |
| 1949 CARLSEN Overhead Track Switch Operating Lever |
| 1949 SULZER AG Operating Internal Combustion Engines |
| 1949 GEN MOTORS CORP Operating Mechanism Machine Guns |
| 1949 KING Canopy Operating Mechanism Patent |
| 1949 REPUBLIC AVIAT CORP Canopy Operating Mechanism |