Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6491836 | Semiconductor wafer and production method therefor | Tadahiro Kato, Sadayuki Okuni, Shunichi Ikeda, Keiichi Okabe | 2002-12-10 |
| 6358117 | Processing method for a wafer | Tadahiro Kato, Keiichi Okabe | 2002-03-19 |
| 6284658 | Manufacturing process for semiconductor wafer | Tadahiro Kato, Sadayuki Okuni, Keiichi Okabe | 2001-09-04 |
| 6220928 | Surface grinding method and apparatus for thin plate work | Keiichi Okabe, Sadayuki Okuni, Tadahiro Kato | 2001-04-24 |