| 1937 HARBERT Dump Car Door Operating Mechanism |
| 1966 MEDLEY Dump Body Door Operating Mechanism |
| 1927 HARRY S HART Dump Car Door Control Patent |
| 1968 STARK Vehicle Dump Door Operating Linkage |
| 1926 ARGYLE Dump Car Door Operating Mechanism |
| 1931 EUCLID CRANE HOIST Dump Wagon Door Operating Gear |
| 1929 MCGAHEY Dump Car Door Lock Patent Print Art |
| 1923 GILPIN GARTH Dump Car Door Patent Print Art |
| 1949 SHEESLEY Dump Car Door Lock Patent Print |
| 1931 STREICH Dump Body Door Operating Mechanism |
| 1957 DOREY Latching Pawl Dog Assembly A Dump Door Shaft |
| 1956 ENTPR Operating Head Dump Door Mechanism |
| 1933 PULLMAN CAR & MFG CORP Dump Car Door Patent |
| 1956 LUNDE Dump Car Door Control Means Patent |
| 1926 HARRY IDOINE Dump Car Door Lock Patent |
| 1922 ENTPR Dump Car Door Operating Mechanism |
| 1920 ANDREW Car Dump Door Operator Patent Print |
| 1941 ALOYS Dump Scow Door Art |
| 1926 ANDREW GERMEK Dump Car Door Lock Patent |
| 1968 KLEE Dump Scow Door Winding Releasing Arrangement |
| 1929 ENTPR Dump Car Door Operating Mechanism Art |
| 1937 SELL Suction Operated Dump Door Vehicles |
| 1922 NEIKIRK Dump Door Operating Mechanism Art |
| 1923 NAT DUMP CAR Dump Car Door Latch Art Print |
| 1922 ARGYLE Dump Car Door Operating Mechanism |
| 1927 HOSCEIT Dump Car Door Control Patent Print |
| 1958 FORT Dump Vehicle Interlocking Door Mechanism |
| 1949 ENTPR Dump Car Door Operating Mechanism Art |
| 1956 ENTPR Dump Door Mechanism A Railway Car Art |
| 1941 GEN STEEL CASTINGS CORP Dump Scow Door Art |
| 1933 MUSSEY WILLIAM Dump Car Door Patent Print |
| 1956 MAGOR CAR CORP Dump Car Door Control Means |
| 1926 ENTPR Dump Car Door Operating Mechanism Art |
| 1931 ARMINGTON Dump Wagon Door Operating Gear |
| 1929 ARGYLE Dump Car Door Operating Mechanism |
| 1921 ARGYLE Dump Car Door Operating Mechanism |
| 1923 NAT DUMP CAR Dump Car Door Latching Mechanism |
| 1923 HART Dump Car Door Locking Releasing Attachment |
| 1932 WESTERN WHEELED SCRAPER COMPAN Dump Wagon Door |
| 1957 ENTPR Latching Pawl Dog Assembly A Dump Door Shaft |
| 1931 STREICH BRO A Dump Wagon Door Operating |
| 1956 GUNNISON Operating Head Dump Door Mechanism |
| 1949 ZIMMER Dump Car Door Operating Mechanism |
| 1921 NAT DUMP CAR COMPANY Door Shaft Lever Art |
| 1923 HART HARRY Dump Car Door Latch Patent Print |
| 1921 ENTPR Dump Car Door Operating Mechanism |
| 1932 BENBOW JAMES Dump Wagon Door Patent Print |
| 1956 DOREY Dump Door Mechanism A Railway Car Art |
| 1926 ARGYLE Dump Door Operating Mechanism Like |
| 1923 DAVID Dump Car Door Latching Mechanism Art |
| 1937 ILLINOIS Dump Car Door Operating Mechanism |
| 1909 IRWIN Dump Car Door Device Patent 8786 |
| 1922 RODGER Dump Door Operating Mechanism Art |
| 1923 UNION METAL PROD CO Dump Car Door Patent |
| 1931 STREICH Dump Wagon Door Operating Art |
| 1926 ENTPR Dump Door Operating Mechanism Like |
| Dump Reagan "Out The Door in '84" Political Pin |