Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12116951 | Cylinder liner and cylinder bore | Takashi Oizumi | 2024-10-15 |
| 11680537 | Cylinder liner and cylinder bore | Masayuki Ohira, Naoki Umeda, Takashi Sato, Takashi Oizumi | 2023-06-20 |
| 10890255 | Combination oil ring | Seeroku HOSHINO, Hirofumi Osada | 2021-01-12 |
| 10571024 | Combination oil ring | Kentaro Kawano | 2020-02-25 |
| 7077402 | Combined oil ring | Masakazu Katumaru, Masami Kawasaki | 2006-07-18 |