| # | Country | Total Patents | |
|---|---|---|---|
| #1 | WIPO (World Intellectual Property Organization) | 7 | |
| #2 | Taiwan | 4 | |
| #3 | China | 3 | |
| #4 | United States | 3 | |
| #5 | EPO (European Patent Office) | 2 | |
| #6 | France | 2 | |
| #7 | United Kingdom | 2 | |
| #8 | Republic of Korea | 2 | |
| #9 | Sweden | 2 | |
| #10 | Singapore | 2 | |
| #11 | Germany | 1 | |
| #12 | Denmark | 1 | |
| #13 | Hong Kong | 1 | |
| #14 | India | 1 | |
| #15 | Malaysia | 1 | |
| #16 | Norway | 1 |
| # | Industry | |
|---|---|---|
| #1 | Chemical engineering | |
| #2 | Engines, pumps and turbines | |
| #3 | Machines | |
| #4 | Transport |
| # | Name | Total Patents |
|---|---|---|
| #1 | Yamada Norio | 15 |
| #2 | Matsuo Takashi | 12 |
| #3 | Koi Kenichi | 11 |
| #4 | Nonaka Kazutaka | 8 |
| #5 | Takahashi Hideto | 7 |
| #6 | Nishida Takahito | 5 |
| #7 | Akiyama J | 4 |
| #8 | Phan Trung Thanh | 4 |
| #9 | Ozawa Takayuki | 3 |
| #10 | Matsumoto Shoji | 3 |
| Publication | Filing date | Title |
|---|---|---|
| WO2015190179A1 | Magnetic filter and magnetic substance removal method | |
| EP1728542A1 | Notched wire filter element and filtration apparatus | |
| US3784016A | Automatic continuously backflow washing-type filter | |
| DK141614B | Automatic self-cleaning filter with continuous backflow. | |
| US3734299A | Automatic continuously backflow washing-type filter |