| Company Name | Type | Status |
|---|---|---|
| P.T.O. INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| PTOLEMAIS INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| P-Tools Company Limited | Private company limited by shares | Live |
| HONGKONG H.S PTOTOELECTRIC TECHNOLOGY LIMITED | Private company limited by shares | Live |
| HONGKONG CCY PTOTOELECTRIC TECHNOLOGY LIMITED | Private company limited by shares | Live |
| HONGKONG ZHONG KUN PTOTOELECTRIC TECHNOLOGY LIMITED | Private company limited by shares | Live |