| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 7 | |
| #2 | Canada | 1 | |
| #3 | Germany | 1 | |
| #4 | Spain | 1 | |
| #5 | Greece | 1 |
| # | Industry | |
|---|---|---|
| #1 | Machines | |
| #2 | Chemical engineering | |
| #3 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Milling | |
| #2 | Magnetic or electrostatic solid separation | |
| #3 | Lubricating | |
| #4 | Shafts | |
| #5 | Separating solids |
| # | Name | Total Patents |
|---|---|---|
| #1 | Weston David | 4 |
| #2 | David Weston | 2 |
| #3 | Macpherson Arthur R | 2 |
| #4 | Turner Robert R | 2 |
| #5 | Robert Turner | 1 |
| #6 | Cornford Arthur S | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US3469795A | Material reduction mill | |
| US3291398A | Beneficiation of magnetic iron ores | |
| US3093426A | Trunnion bearing | |
| US3010661A | Wet material reduction mill | |
| US3017993A | Air classification system | |
| US2849189A | Material reduction mill | |
| CA807139A | Material reduction mill |