Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6641888 | Silicon single crystal, silicon wafer, and epitaxial wafer. | Eiichi Asayama, Masataka Horai, Shigeru Umeno, Shinsuke Sadamitsu, Yasuo Koike +1 more | 2003-11-04 |
| 6599816 | Method of manufacturing silicon epitaxial wafer | Masanori Akatsuka, Yasuo Koike | 2003-07-29 |