| # | Name | Location | Applications |
|---|---|---|---|
| 1. | NTK CUTTING TOOLS CO., LTD. | 🇯🇵 Nagoya-Shi, Aichi, Japan | 1 |
| 2. | NTK CUTTING TOOLS CO., LTD. | 🇯🇵 Komaki-Shi, Japan | 2 |
| 3. | NTK CUTTING TOOLS CO., LTD. | 🇯🇵 Komaki, Japan | 4 |
| 4. | NTK CUTTING TOOLS CO., LTD. | 🇯🇵 Nagoya-Shi, Japan | 1 |
| 5. | NTK Enterprises, Inc. | 🇺🇸 Plano, TX, United States | 4 |