| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Canada | 4 | |
| #2 | China | 2 | |
| #3 | EPO (European Patent Office) | 2 | |
| #4 | United States | 2 | |
| #5 | Japan | 1 |
| # | Industry | |
|---|---|---|
| #1 | Chemical engineering | |
| #2 | Environmental technology | |
| #3 | Machines | |
| #4 | Engines, pumps and turbines | |
| #5 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Separation | |
| #2 | Water treatment | |
| #3 | Unspecified technologies | |
| #4 | Pumps | |
| #5 | Venting or aerating devices |
| # | Name | Total Patents |
|---|---|---|
| #1 | Chau Yiu Chau | 9 |
| #2 | Yiu Chau Chau | 2 |
| Publication | Filing date | Title |
|---|---|---|
| CN111655353A | Liquid treatment device | |
| EP3636598A1 | Liquid treatment apparatus | |
| CA2283056A1 | Regeneration of water treatment media | |
| CA2265235A1 | Multimedia backwashable filtration system | |
| CA2264202A1 | Reverse osmosis pump and shut off valve | |
| CA2256858A1 | Tank treatment assembly |