| 1950 AMERICAN STEEL FOUNDRIES Coupler Operating Rod |
| 1950 CISCO Coupler Operating Rod Bracket Patent |
| 1950 CARNEGIE ILLINOIS STEEL CORP Combination Coupler |
| 1950 BUCKEYE STEEL CASTINGS CO Railway Car Coupler |
| 1950 AMERICAN Coupler Operating Mechanism Art |
| 1950 KINNE EDMUND Coupler AMERICAN STEEL FOUNDRIES |
| 1950 BUCKEYE STEEL CASTINGS CO Antitelescoping Coupler |
| 1950 KINNE Coupler Operating Mechanism Patent |
| 1950 SISSON Car Coupler Positioning Supporting |
| 1950 FREDERIC Combination Coupler Patent Print |
| 1950 STANDARD Car Coupler Positioning Supporting |
| 1950 STANDARD Car Coupler Support Positioning |
| 1950 STANDARD Railway Coupler Operating Art |
| 1950 JOHNSON Antitelescoping Coupler Patent |
| 1950 STANDARD Coupler Operating Mechanism Art |
| 1950 SISSON Swing Motion Emergency Coupler Support |
| 1950 ZEIDLER Cushioned Car Coupler Support Positioning |
| 1950 STANDARD Railway Car Coupler Support Art |
| 1950 STANDARD Coupler Operating Rod Bracket Art |
| 1950 STAMLER Car Coupler Hitching Pin Retaining Means |
| 1950 SISSON Car Coupler Support Positioning Art |
| 1950 WOLFE HARRY Railway Car Coupler Patent |
| 1950 TANGERMAN Railway Coupler Operating Art |
| 1950 BROWN Car Coupler Hitching Pin Retaining Means |
| 1950 BRONSON Coupler Operating Mechanism Patent |
| 1950 STANDARD Swing Motion Emergency Coupler Support |
| 1950 NYSTROM Railway Car Coupler Support Patent |
| 1950 KINNE Coupler Operating Rod Patent Print |
| 1950 AMERICAN STEEL FOUNDRIES Coupler Patent |