Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4556608 | Photomask blank and photomask | Kazuhiro Tabuchi | 1985-12-03 |
| 4374912 | Photomask and photomask blank | Yuzi Kikuchi, Yoji Sasaki | 1983-02-22 |
| 4363846 | Photomask and photomask blank | — | 1982-12-14 |