Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6554476 | Dynamic pressure bearing device and method of manufacturing the same | Masayuki Ishikawa, Hiromasa Marumo | 2003-04-29 |
| 5457350 | Laminated core of rotating electric machine | Hirotaka Sakamaki, Masayuki Ishikawa, Hidetoshi Shimada, Shizunori Mitsuma, Kiyoshi Nagashima +1 more | 1995-10-10 |