| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Switzerland | 6 | |
| #2 | Germany | 5 | |
| #3 | Austria | 3 |
| # | Industry | |
|---|---|---|
| #1 | Engines, pumps and turbines | |
| #2 | Consumer goods | |
| #3 | Measurement | |
| #4 | Thermal processes |
| # | Technology | |
|---|---|---|
| #1 | Non-positive-displacement pumps | |
| #2 | Live-saving devices | |
| #3 | Measuring volume | |
| #4 | Air-conditioning |
| # | Name | Total Patents |
|---|---|---|
| #1 | Kull Ernst | 5 |
| #2 | Gustav Kull | 3 |
| #3 | Kull Gustav | 3 |
| #4 | Kull Rudolf Gustav | 1 |
| Publication | Filing date | Title |
|---|---|---|
| CH664605A5 | Two-way valve for air raid shelter ventilation system - comprises sprung plate to block shock waves caused by high or low external pressure | |
| CH653416A5 | Air conveyor, in particular for ventilation of protective areas. | |
| CH629876A5 | Air-delivery machine |