| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 6 | |
| #2 | EPO (European Patent Office) | 2 | |
| #3 | WIPO (World Intellectual Property Organization) | 2 | |
| #4 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Engines, pumps and turbines | |
| #2 | Environmental technology | |
| #3 | Furniture and games | |
| #4 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Internal-combustion piston engines | |
| #2 | Rotary pistons | |
| #3 | Climate change mitigation in transportation | |
| #4 | Physical training equipment | |
| #5 | Nails | |
| #6 | Machines |
| # | Name | Total Patents |
|---|---|---|
| #1 | Stallkamp Heinrich | 11 |
| #2 | Osterburg Guenter | 9 |
| #3 | Osterburg Guenther | 1 |
| #4 | Osterburg Gunter | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DE4017760A1 | Rotary piston IC engine - has at least one twin piston system with two pistons rotating symmetrically round common axis | |
| DE3711205A1 | Axial opposed piston type internal combustion engine | |
| DE3517260A1 | TURNING PISTON ENGINE | |
| DE3442743A1 | Ball-securing or shuttlecock-securing system | |
| DE3442742A1 | Magnetic shuttlecock | |
| DE3437930A1 | Plug-in connecting element |