Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10879675 | Spark plug | Haruki Yoshida, Kuniharu Tanaka, Yutaka Yokoyama, Hirokazu Kurono, Toshimasa Saji | 2020-12-29 |
| 10586627 | Spark plug | Haruki Yoshida, Kuniharu Tanaka, Yutaka Yokoyama, Yusuke Nomura, Michitaka Yamada | 2020-03-10 |
| 10424901 | Spark plug | Jumpei Isasa, Seiji Nakano, Hirokazu Kurono, Kuniharu Tanaka, Yutaka Yokoyama +1 more | 2019-09-24 |
| 9653888 | Spark plug | Yutaka Yokoyama, Kuniharu Tanaka, Katsuya Takaoka, Nobuyoshi Araki, Toshiki Kon +6 more | 2017-05-16 |