| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Switzerland | 6 | |
| #2 | Spain | 3 | |
| #3 | Austria | 2 | |
| #4 | United Kingdom | 2 | |
| #5 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Chemical engineering |
| # | Technology | |
|---|---|---|
| #1 | Magnetic or electrostatic solid separation |
| # | Name | Total Patents |
|---|---|---|
| #1 | Mestern Hugo | 10 |
| #2 | Muttone Friedrich | 2 |
| #3 | Hugo Mestern | 1 |
| #4 | Mayer Julius | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US1054589A | Device for the production of pure air. | |
| GB190709139A | Improved Device for Preventing the Raising of Dust by Motor Vehicles. | |
| GB189619372A | An Improved Ventilator. |