| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 31 |
| # | Industry | |
|---|---|---|
| #1 | Electrical machinery and energy | |
| #2 | Civil engineering | |
| #3 | Chemical engineering | |
| #4 | Measurement | |
| #5 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Portable lighting devices | |
| #2 | Fire-fighting | |
| #3 | Lighting device details | |
| #4 | Mixing | |
| #5 | Circuits for supplying electric power | |
| #6 | Analysing materials | |
| #7 | Electric incandescent lamps | |
| #8 | Venting or aerating devices | |
| #9 | Safety devices |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hoffmann Albert | 7 |
| #2 | Goehre Ernst | 4 |
| #3 | Kalthoff Karl | 1 |
| #4 | Benecke Richard | 1 |
| #5 | Bielefeld Rolf | 1 |
| #6 | Benner August | 1 |