| 1921 PETERSON HENRY Dumping Bed Patent Print Art |
| 1921 ALEXANDER Clamshell Dumping Device Patent |
| 1921 RANDALL CHARLES Dumping Device Patent Print |
| 1921 BLAKE Dumping Mechanism For Trucks Patent |
| 1921 HARRY PAGE Dumping Wagon Patent Print Art |
| 1921 ALBERT JUELFS Dumping Truck Patent Print |
| 1921 ANDREW Dumping Door Actuator Patent Print |
| 1921 BARKER PERCY Dumping Truck Patent Print Art |
| 1921 GEORGE OLLIE Dumping Body Patent Print Art |
| 1921 BERG Body For Dumping Trucks Patent Print |
| 1921 ALKER CLARENCE Dumping Body Patent Print |
| 1921 HERMAN Gate For Dumping Trucks Patent Print |
| 1921 ARGYLE CAMPBELL Dumping Car Patent Print |
| 1921 SARGENT GEORGE Dumping Bed Patent Print Art |
| 1921 EDWARD Hoisting And Dumping Vehicle Patent |
| 1921 RICHARD MUNZLINGER Dumping Truck Patent |
| 1921 GOOSSEN FRANZ Dumping Truck Patent Print |
| 1921 NELSON Body For Dumping Trucks Patent Print |
| 1921 CUSTAV Dumping Body For Trucks &C Patent |
| 1921 JAMES THOMPSON Dumping Wagon Patent Print |
| 1921 MILLER Dumping Hoist Vehicle Patent Print |
| 1921 FREDRIK WIKING Dumping Barge Patent Print |