| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 14 |
| # | Industry | |
|---|---|---|
| #1 | Chemical engineering | |
| #2 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Milling | |
| #2 | Magnetic or electrostatic solid separation | |
| #3 | Separating solids using liquids | |
| #4 | Unspecified technologies | |
| #5 | Cyclones |
| # | Name | Total Patents |
|---|---|---|
| #1 | Wiegand Edwin L | 11 |
| #2 | Basil Horsfield | 3 |
| Publication | Filing date | Title |
|---|---|---|
| US2456279A | Apparatus for electrostatic separation of material particles | |
| US2392044A | Electrostatic separation of material particles | |
| US2442522A | Hydraulic classifier employing vertical and vortical currents | |
| US2413479A | Conveying of materials | |
| US2414993A | Apparatus for electrostatic separation of material particles | |
| US2382122A | Apparatus for the electrostatic separation of material particles | |
| US2369878A | Separation | |
| US2392020A | Deliquefying means | |
| US2328240A | Processing of materials | |
| US2361253A | Processing of materials | |
| US2392019A | Processing of materials | |
| US2387548A | Processing of materials | |
| US2361207A | Separation | |
| US2375057A | Conveying system |