| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Austria | 20 | |
| #2 | Switzerland | 6 | |
| #3 | United Kingdom | 2 | |
| #4 | Canada | 1 | |
| #5 | Spain | 1 | |
| #6 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Chemical engineering | |
| #2 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Separating solids | |
| #2 | Milling | |
| #3 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Prokop Josef | 28 |
| #2 | Josef Prokop | 2 |
| Publication | Filing date | Title |
|---|---|---|
| CA144056A | Sifter | |
| US1100149A | Sifter. | |
| GB191221013A | Improvements in or relating to Means for Driving Mechanical Sifters. | |
| GB190713232A | Improvements in Processes of and Apparatus for Aspirating Mills. |