| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Austria | 9 | |
| #2 | United States | 2 | |
| #3 | Switzerland | 1 | |
| #4 | Germany | 1 |
| # | Industry | |
|---|---|---|
| #1 | Measurement | |
| #2 | Control |
| # | Technology | |
|---|---|---|
| #1 | Measuring volume | |
| #2 | Analysing materials | |
| #3 | Systems controlling non-electric variables |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hartung Carl A | 11 |
| #2 | Carl A Hartung | 1 |
| #3 | Erich Walter | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US1843815A | Governor provided with an auxiliary force | |
| US1542242A | Method and apparatus for carrying out automatic gas analysis by weight |