| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Republic of Korea | 3 | |
| #2 | China | 2 | |
| #3 | United States | 2 | |
| #4 | EPO (European Patent Office) | 1 | |
| #5 | Hong Kong | 1 | |
| #6 | Taiwan | 1 | |
| #7 | WIPO (World Intellectual Property Organization) | 1 |
| # | Industry | |
|---|---|---|
| #1 | Materials and metallurgy | |
| #2 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Casting metal | |
| #2 | Unspecified technologies | |
| #3 | Foundry moulding | |
| #4 | Alloys |
| # | Name | Total Patents |
|---|---|---|
| #1 | Yoshida Kazunari | 10 |
| #2 | Haga Toshio | 10 |
| #3 | Gonda Yoshio | 10 |
| #4 | Gonda Gentaro | 2 |
| #5 | Yoshio Haga Toshio Yoshida Kaz | 1 |