Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8217296 | Fluid-quality control method, fluid-quality control apparatus, and electric-discharge machining apparatus employing the same | Hisakatsu Kawarai, Yooji Nakajima, Hisashi Yamada | 2012-07-10 |