| 1921 PETERSON HENRY Dumping Bed Patent Print Art |
| 1921 RANDALL CHARLES Dumping Device Patent Print |
| 1920 HINRICHER GERHARD Dumping Device Patent |
| 1961 ROUSE Tandem Dumping Platform Truck Patent |
| 1963 GOODWIN Side Dumping Trailer Patent Print |
| 1924 SHEA WILLIAM Dumping Device Patent Print |
| 1934 YANT Scooping And Dumping Hand Truck Patent |
| 1933 HIGGINS Dumping Land Vehicle Patent Print |
| 1958 CHANEY Truck Dumping Apparatus Patent Print |
| 1925 PROUT Drop Door For Dumping Cars Patent |
| 1932 HIGGINS Dumping Land Vehicle Patent Print |
| 1941 CORNELIUS Dumping Apparatus Patent Print |
| 1968 GOODWIN Side Dumping Trailer Patent Print |
| 1948 GABOURY Dumping Trailer Design Patent 12335 |
| 1926 HOUGH EARL Dumping Gear Patent Print Art |
| 1951 ROY CORNING Dumping Device Patent Print Art |
| 1959 MILLS Carrier Dumping Device Patent Print |
| 1947 THOMAS JR Dumping Carrier Patent Print Art |
| 1966 WEATHERBEE CLAUDE Dumping Device Patent |
| 1924 MEYERS Pressure Dumping Hoist Patent Print |
| 1940 BOLSTER Gasoline Dumping Device Patent |
| 1923 GUY M PETERS Dumping Gear Patent Print Art |
| 1951 HENRY Dumping Apparatus For Vehicles Patent |
| 1962 BAY Coupling And Dumping System Patent |
| 1939 KIRKSEY Trailer Dumping Apparatus Patent |
| 1931 DONDLINGER EUGENE Dumping Gear Patent Print |
| 1914 GRAVES Dumping Machine NATIONAL WAFER Patent 19822 |
| 1959 HOFF EMIL Dumping Trailer Patent Print Art |
| 1958 STOTT CLIFFORD Dumping Trailer Patent Print |
| 1922 WINANS MYRON Dumping Auto Body Patent Print |
| 1957 PAUL ASPERGER Dumping Trailer Patent Print |
| 1965 BEUTLER Container Dumping Apparatus Patent |
| 1966 Dumping Device Patent Print Art |
| 1923 MALONE RAYMOND Dumping Apparatus Patent |
| 1965 FRANKLIN Car Dumping Apparatus Patent Print |
| 1920 WILLIAM Dumping Bed For Wagons Patent Print |