| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 8 | |
| #2 | Canada | 3 |
| # | Industry | |
|---|---|---|
| #1 | Packaging and shipping | |
| #2 | Chemical engineering | |
| #3 | Machines | |
| #4 | Transport |
| # | Technology | |
|---|---|---|
| #1 | Transport or storage devices | |
| #2 | Separating solids | |
| #3 | Unspecified technologies | |
| #4 | Unspecified technologies | |
| #5 | Railway shifting |
| # | Name | Total Patents |
|---|---|---|
| #1 | Winter August P | 6 |
| #2 | Rothgarn Andrew E | 5 |
| Publication | Filing date | Title |
|---|---|---|
| US1987640A | Means for separating materials of different specific gravity | |
| US1954508A | Elevator boot structure | |
| US1954493A | Elevator belt driving mechanism | |
| US1810680A | Pneumatic car puller | |
| US1689972A | Grain separator | |
| US1676307A | Grate for dump pits | |
| US1653975A | Elevator-driving mechanism | |
| US1564920A | Vehicle dump | |
| CA275151A | Vehicle dump | |
| CA280821A | Elevator mechanism | |
| CA349191A | Material separator |