| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Portugal | 6 | |
| #2 | Australia | 5 | |
| #3 | EPO (European Patent Office) | 5 | |
| #4 | Finland | 5 | |
| #5 | Spain | 4 | |
| #6 | Canada | 3 | |
| #7 | United Kingdom | 3 | |
| #8 | Republic of Korea | 2 | |
| #9 | United States | 2 | |
| #10 | WIPO (World Intellectual Property Organization) | 2 | |
| #11 | Denmark | 1 | |
| #12 | Greece | 1 | |
| #13 | Norway | 1 | |
| #14 | South Africa | 1 |
| # | Industry | |
|---|---|---|
| #1 | Transport | |
| #2 | Measurement |
| # | Technology | |
|---|---|---|
| #1 | Marine propulsion | |
| #2 | Measuring force, work and fluid pressure |
| # | Name | Total Patents |
|---|---|---|
| #1 | Walker John Graham | 24 |
| #2 | Walker John G | 6 |
| #3 | Graham Walker John | 2 |
| #4 | Walker J G | 1 |
| #5 | Wlaker John Graham | 1 |
| Publication | Filing date | Title |
|---|---|---|
| PT77256A | Improvements in and relating to wingsail assembly craft and wingsail assembly therefore | |
| PT77239A | Pressure sensig on rigid sails | |
| GB8322270D0 | Pressure sensing on rigid sails | |
| AU1525983A | Aerofoil sail | |
| ES8308509A1 | A self-trimming sailset. | |
| US4473023A | Relating to wingsail craft and wingsails therefor | |
| EP0073589A1 | Improvements in and relating to wingsail craft and wingsails therefor | |
| ZA8201457B | A sail arrangement | |
| AU8104482A | Sail of hinged aerofoil sections |