Issued Patents All Time
Showing 26–34 of 34 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8404406 | Photomask blank and method for manufacturing the same | Hiroyuki Iwashita, Hiroaki Shishido, Masahiro Hashimoto | 2013-03-26 |
| 8329364 | Phase shift mask blank and phase shift mask | Hiroyuki Iwashita, Hiroaki Shishido, Masahiro Hashimoto | 2012-12-11 |
| 8323858 | Photomask blank, photomask, and methods of manufacturing the same | Masahiro Hashimoto, Hiroyuki Iwashita | 2012-12-04 |
| 8304147 | Photomask blank, photomask, and method for manufacturing photomask blank | Hiroyuki Iwashita, Hiroaki Shishido, Masahiro Hashimoto | 2012-11-06 |
| 8114556 | Photomask blank and production method thereof, and photomask production method, and semiconductor device production method | Takeyuki Yamada, Hiroyuki Iwashita, Masahiro Hashimoto, Yasushi Okubo | 2012-02-14 |
| 8043771 | Phase shift mask blank and method of manufacturing phase shift mask | Toshiyuki Suzuki, Yasushi Okubo | 2011-10-25 |
| 8029948 | Photomask blank, photomask, and methods of manufacturing the same | Masahiro Hashimoto, Hiroyuki Iwashita | 2011-10-04 |
| 7794901 | Method of manufacturing mask blank and transfer mask | Toshiyuki Suzuki, Yasushi Okubo | 2010-09-14 |
| 7655364 | Methods of manufacturing mask blank and transfer mask | Toshiyuki Suzuki, Yasushi Okubo | 2010-02-02 |