| # | Name | Location | Applications |
|---|---|---|---|
| 1. | H. Winklhofer & Sohne GmbH and Co. KG | 🇩🇪 Munich, Germany | 1 |
| 2. | HW Internet Telephone & Telecommunication Co., Ltd | Majuro, Marshall Islands | 1 |
| 3. | Hwi Hwa Kim | 🇰🇷 Jecheon-si, South Korea | 1 |
| 4. | Hwin Technologies Corp. | 🇹🇼 Taichung, Taiwan | 2 |