Issued Patents 2018
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10120274 | Method of manufacturing photomask blank and photomask blank | Yukio Inazuki | 2018-11-06 |
| 10040220 | Blank for mold production and method for manufacturing mold | Hideo Nakagawa, Kouhei Sasamoto | 2018-08-07 |
| 9952501 | Photomask blank, making method, and photomask | Shinichi Igarashi, Takashi Yoshii | 2018-04-24 |
| 9880459 | Photomask blank and method for preparing photomask | Kouhei Sasamoto, Yukio Inazuki | 2018-01-30 |