| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Austria | 1 | |
| #2 | Belgium | 1 | |
| #3 | Canada | 1 | |
| #4 | Switzerland | 1 | |
| #5 | Czechoslovakia | 1 | |
| #6 | German Democratic Republic | 1 | |
| #7 | Germany | 1 | |
| #8 | Spain | 1 | |
| #9 | Finland | 1 | |
| #10 | Netherlands | 1 | |
| #11 | Norway | 1 | |
| #12 | Poland | 1 | |
| #13 | Sweden | 1 | |
| #14 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Chemical engineering | |
| #2 | Machine tools |
| # | Technology | |
|---|---|---|
| #1 | Separation | |
| #2 | Presses |
| # | Name | Total Patents |
|---|---|---|
| #1 | Brouwer Egbert K | 5 |
| #2 | Brouwer Egbert Klaas | 4 |
| Publication | Filing date | Title |
|---|---|---|
| CA1093896A | Filter press | |
| US4203845A | Filter press |