| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 34 | |
| #2 | Switzerland | 1 |
| # | Industry | |
|---|---|---|
| #1 | Transport | |
| #2 | Thermal processes | |
| #3 | Engines, pumps and turbines | |
| #4 | Mechanical elements | |
| #5 | Machine tools | |
| #6 | Measurement |
| # | Technology | |
|---|---|---|
| #1 | Aeroplanes | |
| #2 | Venting or aerating devices | |
| #3 | Fluid heaters | |
| #4 | Parachutes | |
| #5 | Internal-combustion piston engines | |
| #6 | Heat-exchanger without contact | |
| #7 | Forging | |
| #8 | Supplying combustion engines | |
| #9 | Analysing materials | |
| #10 | Lubricating |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hugo Junkers Dr Ing | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DE396504C | Airplane with the engine system, driver's compartment and payload compartment following one another | |
| DE348181C | Muffler with an air-flushed casing, especially for aircraft engines |