| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 3 | |
| #2 | China | 2 | |
| #3 | EPO (European Patent Office) | 2 | |
| #4 | Republic of Korea | 2 | |
| #5 | WIPO (World Intellectual Property Organization) | 2 | |
| #6 | Hong Kong | 1 | |
| #7 | Taiwan | 1 |
| # | Industry | |
|---|---|---|
| #1 | Electrical machinery and energy |
| # | Technology | |
|---|---|---|
| #1 | Magnets and transformers |
| # | Name | Total Patents |
|---|---|---|
| #1 | Honna Tsunehiko | 12 |
| #2 | Ishikawa Minoru | 3 |
| #3 | Ishikawa Yuzuru | 2 |
| #4 | Honna Ysunehiko | 1 |
| Publication | Filing date | Title |
|---|---|---|
| KR20140032449A | High-frequency transformer | |
| EP2323143A1 | Three-phase high frequency transformer |