| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Austria | 8 | |
| #2 | Switzerland | 4 | |
| #3 | United Kingdom | 2 | |
| #4 | Germany | 1 | |
| #5 | Denmark | 1 | |
| #6 | Spain | 1 |
| # | Industry | |
|---|---|---|
| #1 | Machine tools |
| # | Technology | |
|---|---|---|
| #1 | Soldering, welding and flame cutting |
| # | Name | Total Patents |
|---|---|---|
| #1 | Lehmann Wilhelm | 14 |
| #2 | Wilhelm Lehmann | 2 |
| #3 | Feldmann Wilhelm | 1 |
| #4 | Schumacher Peter | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DE1909842A1 | Hand-operated spot-welding | |
| GB190620153A | Street Car Trailer Fitted Out for Track Cleaning and Oiling | |
| GB190609618A | Improvements in Steam-engine and like Indicators. |