| # | Country | Total Patents | |
|---|---|---|---|
| #1 | EPO (European Patent Office) | 5 | |
| #2 | Canada | 4 | |
| #3 | Japan | 3 | |
| #4 | United States | 3 | |
| #5 | WIPO (World Intellectual Property Organization) | 3 | |
| #6 | China | 2 | |
| #7 | Hong Kong | 2 | |
| #8 | Taiwan | 2 |
| # | Industry | |
|---|---|---|
| #1 | Optics |
| # | Technology | |
|---|---|---|
| #1 | Spectacles |
| # | Name | Total Patents |
|---|---|---|
| #1 | Cheong Lak | 24 |
| Publication | Filing date | Title |
|---|---|---|
| US8523351B1 | Eyewear with interchangeable attachment | |
| US2013033675A1 | Eyeglass frame, an eyeglass hinge, and a method of assembling a hinge for an eyeglass frame | |
| US2012069293A1 | Eyeglass frame, eyewear, and an eyewear assembly method | |
| HK1053585A2 | Eyeglass frame with removably mounted lenses | |
| TW401523B | Screw for securing an optical lens to a clasp, clasp for retaining an optical lens, and method of forming a custom clip-on assembly for eyeglasses |