| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 11 |
| # | Industry | |
|---|---|---|
| #1 | Measurement | |
| #2 | Electrical machinery and energy |
| # | Technology | |
|---|---|---|
| #1 | Measuring speed and acceleration | |
| #2 | Measuring volume | |
| #3 | Equipment for killing living beings |
| # | Name | Total Patents |
|---|---|---|
| #1 | Fett Theo | 11 |
| #2 | Strauch Friedhelm | 1 |
| #3 | Fett Karl | 1 |
| #4 | Roehrig Walter | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DE2401811A1 | Flow velocity pickup for electrically insulating liquid - is capacitor consisting of insulating tube with two metal electrodes |