| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Hong Kong | 6 | |
| #2 | China | 4 | |
| #3 | Canada | 1 | |
| #4 | EPO (European Patent Office) | 1 | |
| #5 | Japan | 1 | |
| #6 | Republic of Korea | 1 | |
| #7 | Philippines | 1 | |
| #8 | Russian Federation | 1 | |
| #9 | Singapore | 1 | |
| #10 | United States | 1 | |
| #11 | WIPO (World Intellectual Property Organization) | 1 |
| # | Industry | |
|---|---|---|
| #1 | Optics |
| # | Technology | |
|---|---|---|
| #1 | Spectacles |
| # | Name | Total Patents |
|---|---|---|
| #1 | Ku Ngai-Yung Otis | 6 |
| #2 | Otis Ku Ngai Yung | 3 |
| #3 | Ku Otis | 3 |
| #4 | Shouye Niu | 2 |
| #5 | Otis Ku Ngai-Yung | 2 |
| #6 | Ku Ngai Yung Otis | 1 |
| #7 | Otis Ngai-Yung Ku | 1 |
| #8 | Ku Otis Ngai Yung | 1 |
| Publication | Filing date | Title |
|---|---|---|
| CN110389459A | The glasses of bent temple | |
| CN110389458A | The glasses of bent temple | |
| CN106814469A | A kind of glasses with magnetite | |
| HK1214912A2 | Glasses with legs bendable in multiple angles | |
| HK1176514A2 | Spectacle frame hinge with detachable arm | |
| HK1176515A2 | Spectacle frame with magnetic bias hinge | |
| HK1137288A2 | Eyeglasses hinge | |
| HK1134214A2 | Eyeglasses | |
| HK1128584A2 | Eyeglasses hinge |