| # | Country | Total Patents | |
|---|---|---|---|
| #1 | France | 16 | |
| #2 | United Kingdom | 4 | |
| #3 | United States | 1 |
| # | Technology | |
|---|---|---|
| #1 | Aeroplanes | |
| #2 | Systems controlling non-electric variables |
| # | Name | Total Patents |
|---|---|---|
| #1 | Paul Ratie Pierre | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB489353A | Improvements in variable pitch airscrews | |
| GB452635A | Airscrew having an automatically variable pitch | |
| US2141552A | Variable pitch airscrew | |
| GB448081A | Improvements in variable pitch propellors | |
| GB447394A | Improvements in or relating to variable pitch screw-propellors |