| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 10 | |
| #2 | United Kingdom | 1 |
| # | Industry | |
|---|---|---|
| #1 | Furniture and games | |
| #2 | Engines, pumps and turbines | |
| #3 | Environmental technology | |
| #4 | Textiles and paper | |
| #5 | Mechanical elements | |
| #6 | Transport |
| # | Name | Total Patents |
|---|---|---|
| #1 | Lehmann Willy | 7 |
| Publication | Filing date | Title |
|---|---|---|
| DE970788C | Air-compressing, self-ignition internal combustion engine | |
| DE806071C | Diesel engine with swirl chamber | |
| GB344713A | Improvements in and connected with vacuum cleaners |