| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 79 | |
| #2 | France | 74 | |
| #3 | Austria | 2 | |
| #4 | Switzerland | 2 |
| # | Industry | |
|---|---|---|
| #1 | Engines, pumps and turbines | |
| #2 | Transport | |
| #3 | Environmental technology | |
| #4 | Mechanical elements |
| # | Name | Total Patents |
|---|---|---|
| #1 | Duckstein Dipl-Ing Martin | 10 |
| #2 | Spiegel Dipl-Ing Erwin | 5 |
| #3 | Scheidl Franz | 5 |
| #4 | Ramshorn Dipl-Ing Reinhard | 3 |
| #5 | Burger Dipl-Ing Peter | 3 |
| #6 | Friess Karl Albert | 2 |
| #7 | Kettenacker Dr-Ing Ludwig | 2 |
| #8 | Stieglitz Dr-Ing Albert | 2 |
| #9 | Buske Alfred | 2 |
| #10 | Mueller Dipl-Ing Alfred | 2 |
| Publication | Filing date | Title |
|---|---|---|
| DE718487C | Exhaust gas guide device for recoil generation | |
| DE723938C | Automatic adjustment device for temporal power limitation, especially for multi-engine aircraft | |
| DE712363C | Process to improve the cooling effect in multi-row air-cooled radial engines | |
| DE714842C | Aircraft engine with supercharger and exhaust gas turbine |