| 1937 HARBERT Dump Car Door Operating Mechanism |
| 1966 MEDLEY Dump Body Door Operating Mechanism |
| 1940 REXFORD Trackside Dump Mechanism Toy Railroads |
| 1926 ARGYLE Dump Car Door Operating Mechanism |
| 1948 STUDEBAKER CORP Dump Body Control Mechanism |
| 1934 JETT Trailer Dump Mechanism Patent Print |
| 1965 DYER Dump Mechanism For Trucks Patent Print |
| 1931 STREICH Dump Body Door Operating Mechanism |
| 1956 ENTPR Operating Head Dump Door Mechanism |
| 1922 ENTPR Dump Car Door Operating Mechanism |
| 1956 FORT Dump Car Valve Control Mechanism Art |
| 1929 ENTPR Dump Car Door Operating Mechanism Art |
| 1964 HEIL CO Container Dump Mechanism Patent |
| 1922 NEIKIRK Dump Door Operating Mechanism Art |
| 1922 ARGYLE Dump Car Door Operating Mechanism |
| 1958 FORT Dump Vehicle Interlocking Door Mechanism |
| 1949 ENTPR Dump Car Door Operating Mechanism Art |
| 1956 ENTPR Dump Door Mechanism A Railway Car Art |
| 1948 ALEXANDER Dump Body Control Mechanism Art |
| 1926 ENTPR Dump Car Door Operating Mechanism Art |
| 1921 SWANK Automatic Car Dump Mechanism Patent |
| 1937 PERFECTION STEEL BODY Dump Body Hoist Mechanism |
| 1929 ARGYLE Dump Car Door Operating Mechanism |
| 1921 ARGYLE Dump Car Door Operating Mechanism |
| 1923 NAT DUMP CAR Dump Car Door Latching Mechanism |
| 1956 GUNNISON Operating Head Dump Door Mechanism |
| 1949 ZIMMER Dump Car Door Operating Mechanism |
| 1921 ENTPR Dump Car Door Operating Mechanism |
| 1937 BRICK Dump Body Hoist Mechanism Patent |
| 1956 DOREY Dump Door Mechanism A Railway Car Art |
| 1926 ARGYLE Dump Door Operating Mechanism Like |
| 1939 GALION METALLIC VAULT Dump Body Lifting Mechanism |
| 1964 URBAN Container Dump Mechanism Patent Print |
| 1961 WOOD Vehicle Dump Body Hoist Mechanism Art |
| 1933 JUNGERSEN Dump Body Operating Mechanism Art |
| 1923 DAVID Dump Car Door Latching Mechanism Art |
| 1943 MERCHANT Dump Truck Hoist Mechanism Patent |
| 1937 ILLINOIS Dump Car Door Operating Mechanism |
| 1940 WOOD LOUIS Dump Truck Mechanism Patent |
| 1922 RODGER Dump Door Operating Mechanism Art |
| 1940 GAR WOOD IND INC Dump Truck Mechanism Art |
| 1958 WYATT Dump Vehicle Tilting Mechanism Art |
| 1934 WALTER H STIEMKE Trailer Dump Mechanism Art |
| 1965 DYCO INC Dump Mechanism For Trucks Patent |
| 1926 ENTPR Dump Door Operating Mechanism Like |