| # | Industry | |
|---|---|---|
| #1 | Materials and metallurgy | |
| #2 | Basic materials chemistry | |
| #3 | Surface technology and coating | |
| #4 | Chemical engineering |
| # | Technology | |
|---|---|---|
| #1 | Ammonia or cyanogen | |
| #2 | Electrolytic processes | |
| #3 | Chemical or physical processes | |
| #4 | Non-metallic elements | |
| #5 | Alkali metal compounds | |
| #6 | Inorganic treatment materials |
| # | Name | Total Patents |
|---|---|---|
| #1 | Franck Dr H Heinrich | 7 |
| #2 | Heimann Dr Hugo | 4 |
| #3 | Wilm Dr Alexander Von | 2 |
| #4 | Mangold Dr Paul | 2 |
| #5 | Freitag Carl | 1 |
| #6 | Frank Dr Albert R | 1 |
| #7 | Jaehne Dr Willibald | 1 |
| #8 | Hochwald Dr-Ing Fritz | 1 |
| #9 | Freitag Dr Carl | 1 |
| #10 | Frank Dr H Heinrich | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DE553818C | Material for the production of devices resistant to nitric acid or nitric acid-nitrogen oxide mixtures | |
| ES110751A1 | Procedure for the manufacture of alkaline earth cyanamides and magnesium cyanamides. | |
| DE458526C | Production of sodium bifluoride or sodium fluoride |