| 88838242 | NTK | NIPPON TOKUSHU TOGYO KABUSHIKI KAISHA | 7089132 |
| 99742836 | NTK | NIPPON TOKUSHU TOGYO KABUSHIKI KAISHA | — |
| 98791820 | NTK | NIPPON TOKUSHU TOGYO KABUSHIKI KAISHA | 8287423 |
| 78496166 | NTK | NIPPON TOKUSHU TOGYO KABUSHIKI KAISHA | 3072993 |
| 97848823 | NTK | BORRIELLO DE ANDRADE, RENATO FRADE | 7353387 |
| 87583737 | NTK | BORRIELLO DE ANDRADE, RENATO FRADE | 5432811 |
| 79320880 | NTK | Niterra Co., Ltd. | 6882013 |
| 79311779 | NTK | Niterra Co., Ltd. | 6688670 |
| 97844999 | NTK | International Recreational Products LLC | — |
| 87387488 | NTK | NIPPON TOKUSHU TOGYO KABUSHIKI KAISHA DBA NITERRA CO., LTD. | 5852053 |
| 98791845 | NTK | NIPPON TOKUSHU TOGYO KABUSHIKI KAISHA | 7864874 |
| 97016440 | NTK | NIPPON TOKUSHU TOGYO KABUSHIKI KAISHA | 6797510 |
| 87978840 | NTK | NIPPON TOKUSHU TOGYO KABUSHIKI KAISHA DBA NITERRA CO., LTD. | 5613783 |
| 73408796 | NTK | ZENTAKU KOGYO COMPANY | 1279843 |
| 74379590 | NTK | NIPPON TOKUSHU TOGYO KABUSHIKI KAISHA | 1816736 |
| 73367489 | NTK | MARTIN ENGINEERING COMPANY | 1278670 |
| 86017389 | NTK | NIPPON TOKUSHU TOGYO KABUSHIKI KAISHA DBA NITERRA CO., LTD. | 5225629 |
| 86677639 | NTK | International Recreational Products, LLC | 5015846 |
| 90681262 | NTK | TK DREAM INVESTMENTS LLC | — |
| 90681209 | NTK | TK DREAM INVESTMENTS LLC | — |
| 88838911 | NTK | NIPPON TOKUSHU TOGYO KABUSHIKI KAISHA DBA NITERRA CO., LTD. | 6662207 |
| 88568053 | NTK | Niki Korman, LLC | — |
| 87475426 | NTK | Pounder, Inc. | — |
| 87421119 | NTK | Delp, Randell | — |
| 85188638 | NTK | Mentor Group, L.L.C. | 4001873 |
| 78166484 | NTK | Henry Chu | — |
| 78437619 | NTK | Analytical Graphics, Inc. | — |
| 78361164 | NTK | NTK Technologies, Inc. | — |
| 76444191 | NTK | NTK Technologies, Inc. | — |
| 76139878 | NTK | NGK Spark Plug Co., Ltd. | 2643980 |
| 75797460 | NTK | NewTek Corporation | — |
| 75633047 | NTK | NGK SPARK PLUG CO., LTD. | 2316561 |
| 73575158 | NTK | NGK SPARK PLUG CO., LTD. | 1466178 |
| 73134411 | NTK | NGK SPARK PLUG CO., LTD. | 1085324 |