Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7351504 | Photomask blank substrate, photomask blank and photomask | Masayuki Nakatsu, Tsuneo Numanami, Masamitsu Itoh, Tsuneyuki Hagiwara, Naoto Kondo | 2008-04-01 |
| 7344808 | Method of making photomask blank substrates | Tsuneo Numanami, Masayuki Nakatsu, Tsuneyuki Hagiwara, Naoto Kondo | 2008-03-18 |
| 7329475 | Method of selecting photomask blank substrates | Masayuki Nakatsu, Tsuneo Numanami, Masamitsu Itoh, Tsuneyuki Hagiwara, Naoto Kondo | 2008-02-12 |
| 7195846 | Methods of manufacturing photomask blank and photomask | Hideo Kaneko, Yukio Inazuki, Tetsushi Tsukamoto, Katsuya Okumura | 2007-03-27 |
| 7070888 | Method of selecting photomask blank substrates | Masayuki Nakatsu, Tsuneo Numanami, Tsuneyuki Hagiwara, Naoto Kondo | 2006-07-04 |