| # | Country | Total Patents | |
|---|---|---|---|
| #1 | WIPO (World Intellectual Property Organization) | 8 | |
| #2 | EPO (European Patent Office) | 2 | |
| #3 | China | 1 | |
| #4 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Materials and metallurgy | |
| #2 | Environmental technology | |
| #3 | Semiconductors | |
| #4 | Surface technology and coating | |
| #5 | Thermal processes |
| # | Name | Total Patents |
|---|---|---|
| #1 | Oka Nariaki | 12 |
| #2 | Oka Hiroaki | 12 |
| #3 | Onodera Yoshiaki | 1 |
| Publication | Filing date | Title |
|---|---|---|
| WO2015005392A1 | Method for removing radioactive substance contaminating water from water | |
| WO2014069252A1 | Device for increasing purity of metallic silicon | |
| WO2014050787A1 | Method for manufacturing injection needle | |
| EP2541616A1 | Method for manufacturing solar cell using silicon powder | |
| WO2010010627A1 | Device and method for manufacturing fine powder by using rotary crucible | |
| WO2009153865A1 | Micropowder producing apparatus and process |