| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Republic of Korea | 8 | |
| #2 | China | 2 | |
| #3 | Germany | 2 | |
| #4 | WIPO (World Intellectual Property Organization) | 2 |
| # | Industry | |
|---|---|---|
| #1 | Engines, pumps and turbines | |
| #2 | Environmental technology |
| # | Name | Total Patents |
|---|---|---|
| #1 | Kwak Sang Sin | 12 |
| #2 | Kwak Sang Si | 1 |
| #3 | Ssang-Sin Kwak | 1 |
| Publication | Filing date | Title |
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| KR20100081875A | Intake air control device and apparatus controlling intake air and exhaust gas | |
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| KR20060075211A | Inhalation divice of internal combustion engine | |
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| KR100468207B1 | fuel injection apparatus | |
| KR20040074520A | fuel injection apparatus |