| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 7 | |
| #2 | Austria | 2 | |
| #3 | France | 2 | |
| #4 | United States | 2 | |
| #5 | United Kingdom | 1 |
| # | Industry | |
|---|---|---|
| #1 | Measurement |
| # | Technology | |
|---|---|---|
| #1 | Analysing materials | |
| #2 | Measuring electric variables |
| # | Name | Total Patents |
|---|---|---|
| #1 | Farenkopf Rudi | 7 |
| #2 | Rudi Farenkopf | 2 |
| #3 | Fahrenkopf Rudi | 1 |
| #4 | Farenkopf Rudolf | 1 |
| Publication | Filing date | Title |
|---|---|---|
| FR1379585A | needle measuring electrode for hygrometers | |
| US3331020A | Moisture detecting apparatus including a bias control for separately controlling the bias applied to the bases of at least one transistor relative to another | |
| GB1023005A | Improvements in moisture meters | |
| FR1340719A | Measuring device indicating the moisture content of various materials and objects | |
| US3059178A | Hygrometer |