| 1927 EGHOLM JAMES Dumping Truck Patent Print Art |
| 1927 BARRETT Gravity Dumping Construction Patent |
| 1927 AVERY COURTNEY Dumping Apparatus Patent |
| 1927 NAT GRAVE VAULT CO Power Elevated Dumping Truck |
| 1927 MURRAY PRODUCTS Dumping Mechanism Vehicles |
| 1927 NAT GRAVE VAULT CO Self Dumping Truck Art |
| 1927 WOOD HYDRAULIC HOIST BODY CO Dumping Art |
| 1927 EAGLE WAGON WORKS Dumping Apparatus Patent |
| 1927 WILLIAM P BOLAND Dumping Appliance Patent |
| 1927 BARRETT Lifting Dumping Body Art Print |
| 1927 BARRETT Elevating Dumping Apparatus Patent |
| 1927 MAURICE Dumping Mechanism Semitrailers Art |
| 1927 DOUGHERTY Dumping Appliance Patent Print |
| 1927 ENTPR Dumping Door Railway Cars Like Art |
| 1927 BRICK Power Elevated Dumping Truck Patent |
| 1927 CURTIS Means Retaining Dumping Elements Vehicles |
| 1927 POTH Dumping Unit For Motor Trucks Patent |
| 1927 RICHARD RADDATZ Dumping Apparatus Patent |
| 1927 LEONARD Gravity Dumping Truck Body Patent |
| 1927 LARKIN Automatic Dumping Car Patent Print |
| 1927 WOOD Hoist Device For Dumping Bodies Patent |
| 1927 HOWE Dumping Mechanism For Vehicles Patent |
| 1927 WOOD HYDRAULIC HOIST BODY Lifting Dumping Body |
| 1927 COSTA CARVALHO Dumping Vehicle Patent Print |
| 1927 BRICK PERRY Self Dumping Truck Patent Print |
| 1927 GRISCOM RUSSELL CO Vehicle Dumping Mechanism |
| 1927 WOOD HYDRAULIC HOIST BODY Elevating Dumping |
| 1927 PERFECTION STEEL BODY CO Dumping Unit Motor Trucks |
| 1927 DEWALD Vehicle Dumping Mechanism Patent |
| 1927 ARGYLE Dumping Door Railway Cars Like Art |