| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 7 | |
| #2 | Switzerland | 4 | |
| #3 | Canada | 2 |
| # | Industry | |
|---|---|---|
| #1 | Materials and metallurgy | |
| #2 | Machines | |
| #3 | Chemical engineering | |
| #4 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Foundry moulding | |
| #2 | Unspecified technologies | |
| #3 | Unspecified technologies | |
| #4 | Separating solids | |
| #5 | Mixing | |
| #6 | Milling | |
| #7 | Shafts |
| # | Name | Total Patents |
|---|---|---|
| #1 | Simpson Herbert S | 9 |
| #2 | Herbert S Simpson | 3 |
| #3 | Walter Horth | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US1985063A | Bearing seal for mulling machines | |
| US1857337A | Mulling machine | |
| US1615525A | Automatic device for operating and closing discharge doors on mixers | |
| US1534331A | Continuous foundry-sand-mulling machine | |
| US1508031A | Foundry-sand mixer | |
| US1431987A | Separator screen | |
| US1337333A | Foundry-mixer | |
| CA309647A | Mulling machine | |
| CA344511A | Mulling machine |