| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 4 | |
| #2 | EPO (European Patent Office) | 3 | |
| #3 | China | 1 | |
| #4 | United Kingdom | 1 | |
| #5 | Singapore | 1 | |
| #6 | Taiwan | 1 | |
| #7 | WIPO (World Intellectual Property Organization) | 1 |
| # | Industry | |
|---|---|---|
| #1 | Chemical engineering | |
| #2 | Environmental technology | |
| #3 | Machine tools | |
| #4 | Transport | |
| #5 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Mixing | |
| #2 | Separation | |
| #3 | Flotation | |
| #4 | Tools for connecting or disengaging | |
| #5 | Water treatment | |
| #6 | Cleaning | |
| #7 | Vehicle servicing | |
| #8 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Ito Hirotsugu | 8 |
| #2 | Kato Sakae | 4 |
| Publication | Filing date | Title |
|---|---|---|
| CN1155445A | Oil separating method | |
| TW358798B | Oil separating method | |
| EP0500232A1 | Filter cake scraping method and rotary drum type filter using the same | |
| US5177857A | Method for holding an object to a surface using valve controlled vacuum force |