| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 8 | |
| #2 | United States | 3 |
| # | Industry | |
|---|---|---|
| #1 | Textiles and paper | |
| #2 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Treatment of paper-making materials | |
| #2 | Fibrous raw materials | |
| #3 | Milling | |
| #4 | Paper recycling | |
| #5 | Centrifuges |
| # | Name | Total Patents |
|---|---|---|
| #1 | Andreas Biffar | 3 |
| Publication | Filing date | Title |
|---|---|---|
| US1973864A | Centrifugal sieving machine | |
| US1509334A | Pulper | |
| US1520398A | Machine for grinding and sifting wood pulp |