| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Japan | 13 | |
| #2 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Environmental technology | |
| #2 | Engines, pumps and turbines | |
| #3 | Transport |
| # | Name | Total Patents |
|---|---|---|
| #1 | Nagata Sumiyuki | 14 |
| #2 | Cobb Ryan William | 1 |
| Publication | Filing date | Title |
|---|---|---|
| JP2020183747A | Four-cycle rotary engine | |
| JP2018132054A | Four-cycle rotary engine | |
| JP2009206465A | Cooling device of computer | |
| JP2009168003A | Invention for improving combustion efficiency of combustion engine | |
| JP2007239727A | Four-cycle rotary engine | |
| JP2004100674A | Four-cycle rotary engine | |
| JP2002130841A | Solar heat collecting heating system | |
| JP2002089277A | Four-cycle rotary engine | |
| JP2001082812A | Solar heat collecting system | |
| JP2001055187A | Bicycle with rear suspension | |
| JPH10287286A | Fender for bicycle | |
| JPH09144551A | Four-cycle rotary engine | |
| JPH01313689A | Rotary pump with mechanically interlocked isolating vane |