| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Republic of Korea | 22 | |
| #2 | EPO (European Patent Office) | 12 | |
| #3 | China | 9 | |
| #4 | United States | 9 | |
| #5 | Hong Kong | 1 | |
| #6 | Malaysia | 1 | |
| #7 | Singapore | 1 | |
| #8 | Taiwan | 1 | |
| #9 | WIPO (World Intellectual Property Organization) | 1 |
| # | Industry | |
|---|---|---|
| #1 | Chemical engineering | |
| #2 | Environmental technology | |
| #3 | Thermal processes | |
| #4 | Optics | |
| #5 | Materials and metallurgy | |
| #6 | Machines | |
| #7 | Textiles and paper | |
| #8 | Mechanical elements |
| # | Name | Total Patents |
|---|---|---|
| #1 | Tanaka Minoru | 9 |
| #2 | Nakano Toshiro | 7 |
| #3 | Kimura Kohichi | 7 |
| #4 | Shimada Jun | 7 |
| #5 | Imai Akihiro | 6 |
| #6 | Nakama Shigeru | 6 |
| #7 | Tanahashi Takashi | 6 |
| #8 | Sasaki Haruko | 6 |
| #9 | Yamazaki Teruzi | 5 |
| #10 | Horiuchi Osamu | 5 |
| Publication | Filing date | Title |
|---|---|---|
| EP1400761A1 | Method and device for cleaning air | |
| US2002177520A1 | Chemical filter | |
| US2001029843A1 | Chemical filter and manufacturing method thereof |