Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12322930 | Insulator and spark plug | Yutaka Yokoyama, Ippei Kato | 2025-06-03 |
| 11183819 | Spark plug | Yutaka Yokoyama, Nobuyoshi Araki, Kuniharu Tanaka, Haruki Yoshida, Hironori Uegaki +1 more | 2021-11-23 |
| 9912125 | Spark plug | Haruki Yoshida, Jumpei Isasa, Toshitaka Honda, Yutaka Yokoyama, Kuniharu Tanaka +1 more | 2018-03-06 |
| 9755404 | Spark plug | Jumpei Isasa, Haruki Yoshida, Yutaka Yokoyama, Kuniharu Tanaka, Nobuyoshi Araki | 2017-09-05 |
| 9653888 | Spark plug | Yutaka Yokoyama, Kuniharu Tanaka, Katsuya Takaoka, Shun Kondo, Nobuyoshi Araki +6 more | 2017-05-16 |