Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5700210 | Racket frame and process for producing the same | Kenjiro Takechi, Hitomi Kojo | 1997-12-23 |
| 4242608 | Motor using Hall effect elements | Toshio Sugiyama | 1980-12-30 |
YI
Yasuhiro Ishigaki
Hitachi: 1 patents #17,742 of 28,497Top 65%
Overall (All Time): #2,275,215 of 4,157,543Top 55%
2
Patents All Time