| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Austria | 3 | |
| #2 | United Kingdom | 3 | |
| #3 | United States | 3 | |
| #4 | Switzerland | 1 | |
| #5 | Denmark | 1 | |
| #6 | Spain | 1 |
| # | Industry | |
|---|---|---|
| #1 | Engines, pumps and turbines | |
| #2 | Transport |
| # | Technology | |
|---|---|---|
| #1 | Cyclically operating valves | |
| #2 | Aeroplanes |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hueckel Hugo | 11 |
| Publication | Filing date | Title |
|---|---|---|
| US1173970A | Slide-valve gear for four-stroke explosive-engines. | |
| GB191215994A | Improvements in Slide Valve Gears for Four Stroke Explosion Engines. | |
| US974490A | Blade-feathering mechanism for propellers and the like. | |
| US854038A | Machine with revolving wings or blades, applicable either as propeller, motor, pump or blowing-engine. | |
| GB190405787A | Machine with Revolving Wings or Blades, applicable either as Propeller, Motor, Pump, or Blowing Engine. |