| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 3 | |
| #2 | Sweden | 3 | |
| #3 | France | 2 | |
| #4 | Italy | 2 | |
| #5 | United States | 2 |
| # | Industry | |
|---|---|---|
| #1 | Textiles and paper | |
| #2 | Chemical engineering | |
| #3 | Machine tools | |
| #4 | Environmental technology |
| # | Technology | |
|---|---|---|
| #1 | Presses | |
| #2 | Separation | |
| #3 | Paper-making machines | |
| #4 | Climate change mitigation in wastewater treatment | |
| #5 | Fibrous raw materials | |
| #6 | Paper recycling | |
| #7 | Treatment of paper-making materials |
| # | Name | Total Patents |
|---|---|---|
| #1 | Wallen L | 3 |
| #2 | Wallen Lennart | 3 |
| #3 | Wallen Lennart E O | 2 |
| Publication | Filing date | Title |
|---|---|---|
| US3943034A | Dewatering and homogenizing apparatus | |
| DE2417309A1 | THICKER | |
| DE2410440A1 | DUTCH |