| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 8 | |
| #2 | Canada | 4 |
| # | Industry | |
|---|---|---|
| #1 | Transport | |
| #2 | Machines | |
| #3 | Mechanical elements | |
| #4 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Unspecified technologies | |
| #2 | Load transportation vehicles | |
| #3 | Motor vehicles | |
| #4 | Construction of roads | |
| #5 | Servomotors | |
| #6 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Penney Raymond A | 4 |
| #2 | Merchant Donald R | 3 |
| #3 | Jelinek Joseph F | 3 |
| #4 | Emmet O'Reilly | 2 |
| #5 | Harley Bertron G | 1 |
| #6 | Clark Frank G | 1 |
| #7 | O'Reilly Emmet | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2401660A | Latch mechanism for dump trucks | |
| US2390268A | Truck elevator | |
| US2364741A | Telescopic jack structure | |
| US2321406A | Dump truck hoist mechanism | |
| US2246359A | Keeper link | |
| US2246358A | Convertible end gate hinge | |
| US2136614A | Levelizer | |
| US1932690A | Hoist for tilting dump bodies | |
| CA456608A | Truck elevator | |
| CA416942A | Dump truck hoist mechanism | |
| CA413578A | Keeper link | |
| CA444764A | Dump truck latch mechanism |