| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Japan | 4 | |
| #2 | WIPO (World Intellectual Property Organization) | 3 | |
| #3 | China | 2 | |
| #4 | EPO (European Patent Office) | 2 | |
| #5 | Brazil | 1 | |
| #6 | Canada | 1 | |
| #7 | Republic of Korea | 1 | |
| #8 | Peru | 1 | |
| #9 | Russian Federation | 1 | |
| #10 | Taiwan | 1 | |
| #11 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Engines, pumps and turbines | |
| #2 | Environmental technology |
| # | Name | Total Patents |
|---|---|---|
| #1 | Unno Yuji | 18 |
| Publication | Filing date | Title |
|---|---|---|
| WO2010086958A1 | Hydraulic power generation device | |
| JP2008150951A | Road surface water sprinkling system and road surface water sprinkling method | |
| JP2008151151A | Low head hydraulic power generation device | |
| JP2007177797A | Hydraulic power generating device | |
| JP2007146851A | Windmill for wind power generation and wind power generator |