| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 45 |
| # | Industry | |
|---|---|---|
| #1 | Measurement | |
| #2 | Control | |
| #3 | Electrical machinery and energy | |
| #4 | Audio-visual technology | |
| #5 | Optics |
| # | Technology | |
|---|---|---|
| #1 | Measuring light | |
| #2 | Measuring temperature | |
| #3 | Analysing materials | |
| #4 | Alarm systems | |
| #5 | Special measuring | |
| #6 | Electric discharge tubes | |
| #7 | Optical systems | |
| #8 | Special electric heating or lighting | |
| #9 | Registering devices | |
| #10 | Loudspeakers and microphones |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hase Dr Rudolf | 7 |