| 1921 MOSES M KAHN Dump Body Partition Operating Means |
| 1921 LEDYARD Revolving Bottom Dump Wagon Patent |
| 1921 FONTAINE ROBERT Dump Truck Patent Print Art |
| 1921 RUNDLE WILLIAM Dump Car Latch Patent Print |
| 1921 SALE ROBERT Toy Dump Cart Patent Print Art |
| 1921 KAHN Dump Body Partition Operating Means |
| 1921 SWANK Automatic Car Dump Mechanism Patent |
| 1921 BEACH HOWARD Dump Car Patent Print Art |
| 1921 ARGYLE Dump Car Door Operating Mechanism |
| 1921 RODGER BALLAST CAR COMPANY Dump Car Patent |
| 1921 HOSCEIT WILLIAM Dump Car Patent Print Art |
| 1921 NAT DUMP CAR COMPANY Door Shaft Lever Art |
| 1921 GILBERT Three Wheel Dump Cart Patent Print |
| 1921 ENTPR Dump Car Door Operating Mechanism |
| 1921 ELLS HALLETT Dump Body Patent Print Art |
| 1921 GILBERT Toy Dump Cart Or Wagon Patent Print |
| 1921 NELS EKBERG Dump Car Patent Print Art |
| 1921 PETERSON PETER Dump Wagon Patent Print Art |
| 1921 DAVID HINDAHL Dump Car RODGER BALLAST CAR |
| 1921 BUDDY-L #201 Dump Truck |