| # | Name | Location | Applications |
|---|---|---|---|
| 1. | PB TECHNIEK B.V. | 🇳🇱 Maasdijk, Netherlands | 1 |
| 2. | PB Telecom, Inc. | 🇺🇸 Seattle, WA, United States | 1 |
| 3. | PBT (IP) LIMITED | 🇬🇧 Harlow, Essex, United Kingdom | 1 |
| 4. | PBT (IP) Limited | 🇬🇧 Essex, United Kingdom | 1 |
| 5. | PBT (IP) Limited | 🇬🇧 , United Kingdom | 3 |
| 6. | PBT INTERNATIONAL LIMITED | 🇬🇧 Somerset, United Kingdom | 1 |
| 7. | PBTT, INC. | 🇺🇸 NEWBURGH, IN, United States | 1 |