| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 5 | |
| #2 | Norway | 4 | |
| #3 | EPO (European Patent Office) | 3 | |
| #4 | United States | 3 | |
| #5 | Australia | 2 | |
| #6 | Japan | 2 | |
| #7 | WIPO (World Intellectual Property Organization) | 2 | |
| #8 | Brazil | 1 | |
| #9 | Canada | 1 | |
| #10 | China | 1 | |
| #11 | France | 1 | |
| #12 | United Kingdom | 1 | |
| #13 | Italy | 1 | |
| #14 | Netherlands | 1 | |
| #15 | South Africa | 1 |
| # | Industry | |
|---|---|---|
| #1 | Engines, pumps and turbines | |
| #2 | Civil engineering | |
| #3 | Packaging and shipping | |
| #4 | Transport | |
| #5 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Rotary-pistons | |
| #2 | Special wind, spring and weight motors | |
| #3 | Earth drilling | |
| #4 | Transferring liquids | |
| #5 | Ships | |
| #6 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Rohlfing Gerhard | 18 |
| #2 | Karge Volkmar Dipl Ing | 8 |
| #3 | Brandt Jens-Uwe | 5 |
| #4 | Karge Volkmar | 3 |
| #5 | Jaeschke Axel | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DE19625992C1 | Emptying ship's tank filled with oil or chemicals | |
| DE4330226C1 | Eccentric worm screw pump | |
| DE4316735A1 | Pumping method for operating a multi-phase screw pump and pump | |
| EP0297274A2 | Transfer arrangement consisting of a pump with a driving device | |
| AU3606984A | Eccentric helical rotor pump |