| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 16 | |
| #2 | United Kingdom | 2 |
| # | Industry | |
|---|---|---|
| #1 | Machine tools | |
| #2 | Measurement | |
| #3 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Forging | |
| #2 | Analysing materials | |
| #3 | Measuring distances | |
| #4 | Making forged metal products | |
| #5 | Lubricating |
| # | Name | Total Patents |
|---|---|---|
| #1 | Lessen Emil Von | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB277855A | Improvements in a pendulum hardness tester | |
| GB166528A | Improvements in power hammers |