| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Republic of Korea | 12 | |
| #2 | United States | 6 | |
| #3 | China | 5 | |
| #4 | WIPO (World Intellectual Property Organization) | 5 | |
| #5 | United Kingdom | 4 | |
| #6 | Germany | 1 |
| # | Industry | |
|---|---|---|
| #1 | Engines, pumps and turbines | |
| #2 | Machines | |
| #3 | Materials and metallurgy | |
| #4 | Optics | |
| #5 | Mechanical elements | |
| #6 | Chemical engineering | |
| #7 | Transport |
| # | Technology | |
|---|---|---|
| #1 | Rotary-pistons | |
| #2 | Rotary pistons | |
| #3 | Building materials | |
| #4 | Shaping clay | |
| #5 | Unspecified technologies | |
| #6 | Shafts | |
| #7 | Unspecified technologies | |
| #8 | Optical systems | |
| #9 | Vehicle wheels | |
| #10 | Cleaning |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hwang Booseok | 16 |
| #2 | Hwang Kwangseon | 13 |
| #3 | Hwang Boo Seok | 11 |
| #4 | Hwang Kwang Seon | 7 |
| #5 | Iijima Kenzaburou | 2 |
| #6 | Tomaru Satoru | 2 |
| #7 | Hoshi Toshiharu | 2 |
| #8 | Hwang Gwangbok | 2 |
| #9 | Yasutake Hidetoshi | 2 |
| #10 | Ishii Yoshikazu | 2 |
| Publication | Filing date | Title |
|---|---|---|
| GB2500003A | Scroll fluid machine | |
| CN103291616A | Vortex type fluid machinery | |
| WO2010097959A1 | Scroll fluid machine | |
| WO2010070757A1 | Scroll fluid machine | |
| WO2010021019A1 | Eccentric drive scroll fluid machine | |
| WO2010013351A1 | Scroll fluid machine | |
| US2010032086A1 | Decoration Method of Ceramics | |
| KR20050120841A | The vacuum suction ultrasonic wave washing method and its equipment of a detailed hole nozzle |