| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 12 |
| # | Industry | |
|---|---|---|
| #1 | Engines, pumps and turbines | |
| #2 | Transport |
| # | Technology | |
|---|---|---|
| #1 | Rotary-pistons | |
| #2 | Lubricating of machines | |
| #3 | Rotary pistons | |
| #4 | Motor vehicles |
| # | Name | Total Patents |
|---|---|---|
| #1 | Watanabe Takatoshi | 8 |
| #2 | Miyajima Junichi | 8 |
| #3 | Izutsu Masato | 4 |
| #4 | Koyashiki Hidehiko | 3 |
| #5 | Senbongi Yuji | 2 |
| #6 | Kato Yuya | 2 |
| #7 | Uematsu Tomohiro | 1 |
| #8 | Kosugi Yasuhiro | 1 |
| #9 | Yamane Kosuke | 1 |
| #10 | Kawakami Takahiro | 1 |