Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7059290 | Cylinder liner with its inner peripheral surface formed with surface treatment layer, and method for machining to the surface treatment layer | Yoshiki Ishikawa | 2006-06-13 |
| 6220214 | Cylinder liner formed with cross-hatching grooves | Genshin Kojima, Munehiko Doi | 2001-04-24 |