| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Canada | 3 | |
| #2 | Germany | 3 | |
| #3 | United States | 3 | |
| #4 | Netherlands | 2 | |
| #5 | United Kingdom | 1 |
| # | Industry | |
|---|---|---|
| #1 | Engines, pumps and turbines | |
| #2 | Environmental technology | |
| #3 | Basic materials chemistry |
| # | Name | Total Patents |
|---|---|---|
| #1 | Seki Kazuichi | 8 |
| #2 | Shimizu Yoshio | 8 |
| #3 | Kato Yoshio | 7 |
| #4 | Kato Yoshio Prof | 2 |
| #5 | Seki Kazuichi Prof | 1 |
| #6 | Shimizu Yoshio Prof | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US4247253A | Vertical axis wind turbine | |
| DE2816026A1 | WIND POWER MACHINE WITH VERTICAL AXIS | |
| CA1098042A | Vertical axis type wind power turbine | |
| NL7801766A | Wind energy turbine with vertical axle type. |