| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Hong Kong | 5 | |
| #2 | United States | 4 | |
| #3 | China | 3 | |
| #4 | WIPO (World Intellectual Property Organization) | 2 | |
| #5 | EPO (European Patent Office) | 1 |
| # | Industry | |
|---|---|---|
| #1 | Electrical machinery and energy |
| # | Technology | |
|---|---|---|
| #1 | Electrically-conductive connections | |
| #2 | Electric switches |
| # | Name | Total Patents |
|---|---|---|
| #1 | Ma Hing Wai Michael | 12 |
| #2 | Michael Ma Hing Wai | 2 |
| #3 | Qingwei Ma | 1 |
| Publication | Filing date | Title |
|---|---|---|
| EP2942845A1 | A universal socket device | |
| HK1197635A2 | Fuse structure of plug apparatus | |
| HK1197634A2 | Plug apparatus with movable pin | |
| HK1147171A2 | A base for portable mobile terminal device | |
| US7661992B1 | Safe power plugging mechanism | |
| CN101752750A | Power source safe socket structure | |
| US2010093198A1 | Safety protection structure for universal sockets |