| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United Kingdom | 6 | |
| #2 | Sweden | 4 | |
| #3 | South Africa | 2 | |
| #4 | Denmark | 1 | |
| #5 | Finland | 1 | |
| #6 | New Zealand | 1 |
| # | Industry | |
|---|---|---|
| #1 | Chemical engineering | |
| #2 | Environmental technology | |
| #3 | Machine tools |
| # | Technology | |
|---|---|---|
| #1 | Separation | |
| #2 | Presses | |
| #3 | Water treatment | |
| #4 | Mixing | |
| #5 | Chemical or physical processes | |
| #6 | Climate change mitigation in wastewater treatment |
| # | Name | Total Patents |
|---|---|---|
| #1 | Baehr A | 9 |
| Publication | Filing date | Title |
|---|---|---|
| GB1541510A | Sludge treatment | |
| GB1326507A | Press filter more particularly for dewatering sludge in sewage treatment plants |