| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 23 |
| # | Industry | |
|---|---|---|
| #1 | Electrical machinery and energy | |
| #2 | Machine tools | |
| #3 | Mechanical elements | |
| #4 | Machines | |
| #5 | Furniture and games |
| # | Technology | |
|---|---|---|
| #1 | Dynamo-electric machines | |
| #2 | Multi-purpose tools | |
| #3 | Electrically-conductive connections | |
| #4 | Shafts | |
| #5 | Electric motor controls | |
| #6 | Turning | |
| #7 | Domestic washing | |
| #8 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Lau James Ching Sik | 23 |
| #2 | Wong Duncan Yiu Lung | 9 |
| #3 | Jin Chang Lin | 6 |
| #4 | Louie Yuen Tung | 4 |
| #5 | Yang Xiao Jun | 4 |
| #6 | Cheung Chun Kit | 3 |
| #7 | Liu Aloys J | 3 |
| #8 | Yu Chun Kei | 2 |
| #9 | Zhou Ke Lin | 1 |
| #10 | Yang Jun | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2011012550A1 | Power tool with a DC brush motor and with a second power source | |
| US2010225198A1 | Brush design for electric motor having commutator |