| # | Country | Total Patents | |
|---|---|---|---|
| #1 | EPO (European Patent Office) | 4 | |
| #2 | WIPO (World Intellectual Property Organization) | 4 | |
| #3 | United States | 3 | |
| #4 | Canada | 2 | |
| #5 | China | 2 | |
| #6 | Australia | 1 | |
| #7 | Republic of Korea | 1 |
| # | Industry | |
|---|---|---|
| #1 | Engines, pumps and turbines | |
| #2 | Mechanical elements |
| # | Name | Total Patents |
|---|---|---|
| #1 | Yonehara Ryoichi | 15 |
| #2 | Ryoichi Yonehara | 2 |
| Publication | Filing date | Title |
|---|---|---|
| EP2233749A1 | Pressurizing centrifugal pump | |
| US2007196207A1 | Pressurizing centrifugal pump | |
| CA2493419A1 | Mix-in structure for gas or the like in pressurization centrifugal pump | |
| EP0597104A1 | Oldham drive engine |