| # | Country | Total Patents | |
|---|---|---|---|
| #1 | France | 18 | |
| #2 | Germany | 9 | |
| #3 | United Kingdom | 3 | |
| #4 | United States | 2 |
| # | Industry | |
|---|---|---|
| #1 | Transport | |
| #2 | Engines, pumps and turbines | |
| #3 | Civil engineering | |
| #4 | Measurement |
| # | Technology | |
|---|---|---|
| #1 | Aeroplanes | |
| #2 | Parachutes | |
| #3 | Marine propulsion | |
| #4 | Controlling combustion engines | |
| #5 | Ships | |
| #6 | Measuring length, angles and areas | |
| #7 | General building constructions | |
| #8 | Cyclically operating valves | |
| #9 | Swimming pools |
| # | Name | Total Patents |
|---|---|---|
| #1 | Levasseur Pierre | 9 |
| #2 | Pierre Levasseur | 2 |
| Publication | Filing date | Title |
|---|---|---|
| US1921931A | Screw propeller | |
| GB362210A | Improvements in screw propellers with variable pitch | |
| GB189792A | Improvements in screw-propellers | |
| GB157776A | A method for fixing by one extremity a piece of composite wood such as a propeller blade on a support such as a metal boss | |
| US1389146A | Aerial propeller |