| # | Name | Location | Applications |
|---|---|---|---|
| 1. | H&K Group, Inc. | πΊπΈ Skipjack, PA, United States | 1 |
| 2. | HK GRAPHENE TECHNOLOGY CORPORATION | πΊπΈ Pasadena, CA, United States | 2 |
| 3. | HKG CORPORATION LIMITED | π¨π³ Shenzhen, Guangdong, China | 1 |
| 4. | HKG TECHNOLOGIES LIMITED | ππ° Hong Kong, Hong Kong | 1 |