| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 11 |
| # | Industry | |
|---|---|---|
| #1 | Machine tools | |
| #2 | Packaging and shipping |
| # | Technology | |
|---|---|---|
| #1 | Tools for connecting or disengaging | |
| #2 | Handles for hand implements | |
| #3 | Multi-purpose tools | |
| #4 | Workshop equipment | |
| #5 | Containers for goods storage |
| # | Name | Total Patents |
|---|---|---|
| #1 | Tsai Chung-Yu | 9 |
| #2 | Tsai Chung Yu | 2 |
| Publication | Filing date | Title |
|---|---|---|
| US2021001459A1 | Grip device for hexagonal wrenches | |
| US2021001460A1 | Grip bar for hexagonal wrench | |
| US2020398418A1 | Grip device for hexagonal wrenches | |
| US2019329393A1 | Tool combination | |
| US10434638B1 | Tool box assembly | |
| US2019299389A1 | Hand tool adapter | |
| US2019176317A1 | Hand tool assembly | |
| US2017326713A1 | Magnetic sleeve for positioning screwdriver bit | |
| US2017274509A1 | Magnetic positioning device for hand tool | |
| US2017190040A1 | Tool assembly | |
| US2016354916A1 | Connection device for hexagonal wrench |