| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 14 | |
| #2 | United Kingdom | 1 |
| # | Industry | |
|---|---|---|
| #1 | Chemical engineering | |
| #2 | Thermal processes | |
| #3 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Separation | |
| #2 | Furnaces | |
| #3 | Magnetic or electrostatic solid separation | |
| #4 | Gearing |
| # | Name | Total Patents |
|---|---|---|
| #1 | Luehr Heinrich | 13 |
| Publication | Filing date | Title |
|---|---|---|
| GB1057838A | Fliter apparatus with parallel filter cells containing granular filter layers |