| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 46 | |
| #2 | Belgium | 1 | |
| #3 | France | 1 | |
| #4 | United Kingdom | 1 | |
| #5 | Netherlands | 1 | |
| #6 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Materials and metallurgy | |
| #2 | Basic materials chemistry | |
| #3 | Mechanical elements | |
| #4 | Chemical engineering | |
| #5 | Environmental technology |
| # | Name | Total Patents |
|---|---|---|
| #1 | Franck Dr H Heinrich | 10 |
| #2 | Heimann Dr Hugo | 6 |
| #3 | Fischer Thomas | 6 |
| #4 | Nikodem Caro | 6 |
| #5 | Wendlandt Dr Rudolf | 5 |
| #6 | Frank Dr H Heinrich | 2 |
| #7 | Siebert Dr Werner | 2 |
| #8 | Neubner Dr Rolf | 2 |
| #9 | Jaehne Dr Willibald | 1 |
| #10 | Fueldner Dipl-Ing Hans | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DE596058C | lubricant | |
| GB342068A | A process for preparing concentrated nitric acid |