| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 13 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Engines, pumps and turbines | |
| #3 | Basic materials chemistry | |
| #4 | Environmental technology | |
| #5 | Transport |
| # | Technology | |
|---|---|---|
| #1 | Gearing | |
| #2 | Rotary-pistons | |
| #3 | Clutches and brakes | |
| #4 | Gas-turbine plants | |
| #5 | Producer gas production | |
| #6 | Jet-propulsion plants | |
| #7 | Shafts | |
| #8 | Aeroplanes | |
| #9 | Gas-flow silencers for machines |
| # | Name | Total Patents |
|---|---|---|
| #1 | Lutz Dr-Ing Otto | 11 |
| #2 | Caroli Dipl-Ing G | 1 |
| #3 | Caroli Dipl-Ing Gerhard | 1 |