| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 9 | |
| #2 | United Kingdom | 1 | |
| #3 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Measurement | |
| #3 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Safety devices | |
| #2 | Blasting | |
| #3 | Measuring light | |
| #4 | Construction of roads | |
| #5 | Analysing materials |
| # | Name | Total Patents |
|---|---|---|
| #1 | Emil Witte | 1 |
| #2 | Witte Emil | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2045743A | Colorimeter | |
| GB355412A | Preventing explosions in mines |