| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 6 | |
| #2 | China | 2 | |
| #3 | United Kingdom | 2 | |
| #4 | Hong Kong | 2 | |
| #5 | Malaysia | 1 | |
| #6 | Singapore | 1 |
| # | Industry | |
|---|---|---|
| #1 | Electrical machinery and energy | |
| #2 | Furniture and games | |
| #3 | Consumer goods |
| # | Technology | |
|---|---|---|
| #1 | Installation of electric cables | |
| #2 | Electrically-conductive connections | |
| #3 | Special musical instruments | |
| #4 | Toys |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hop Lee | 7 |
| #2 | Lee Hop | 6 |
| Publication | Filing date | Title |
|---|---|---|
| CN1150706A | Electric cable connector | |
| CN1081286A | Plug | |
| GB8309525D0 | Electrical connector box | |
| GB2120021A | Electric plug | |
| US3475850A | Toy windmill | |
| US3349946A | Electric outlet box | |
| US3355700A | Electric sockets mounted in an outlet box | |
| US3346833A | Electric plug and socket with interlocking terminals | |
| US3195100A | Electric plug coupling | |
| US3131590A | Musical whistle |