| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 9 | |
| #2 | WIPO (World Intellectual Property Organization) | 4 | |
| #3 | Germany | 1 |
| # | Industry | |
|---|---|---|
| #1 | Engines, pumps and turbines | |
| #2 | Environmental technology | |
| #3 | Electrical machinery and energy | |
| #4 | Mechanical elements | |
| #5 | Machine tools | |
| #6 | Machines | |
| #7 | Transport |
| # | Name | Total Patents |
|---|---|---|
| #1 | Holstein Benjamin | 14 |
| #2 | Perner Norman | 10 |
| #3 | Lochschmidt Jorg | 3 |
| #4 | Spiegel Klaus | 2 |
| #5 | Holle Michael | 2 |
| #6 | Hoffmann Rolf | 1 |
| #7 | Pontow Thomas | 1 |
| #8 | Borrmann Hans | 1 |
| #9 | Kruger Klaus | 1 |
| #10 | Bronowski Helmut | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DE102006020311A1 | Double-bowl centrifugal drum, e.g. for filtering ponds and aquariums, has inner and outer centrifugal bodies and a bearing |