Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12372863 | Photomask blank, method for producing photomask, and photomask | Ryusei Terashima | 2025-07-29 |
| 12197121 | Phase shift mask blank, manufacturing method of phase shift mask, and phase shift mask | Shohei Mimura, Takuro Kosaka | 2025-01-14 |
| 11971653 | Photomask blank, method for producing photomask, and photomask | Kouhei Sasamoto | 2024-04-30 |
| 11422456 | Phase shift mask blank, method for producing phase shift mask, and phase shift mask | Takuro Kosaka, Shohei Mimura | 2022-08-23 |
| 11402744 | Photomask blank, manufacturing method of photomask and photomask | — | 2022-08-02 |
| 11131920 | Photomask blank, and method of manufacturing photomask | Yukio Inazuki, Kouhei Sasamoto | 2021-09-28 |
| 10788747 | Photomask blank and method for producing photomask | Yukio Inazuki, Kouhei Sasamoto | 2020-09-29 |