Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10005693 | Opaque quartz glass and method for its production | Satori Hirai, Kazuyoshi Arai | 2018-06-26 |
| 8211817 | Fused silica glass and process for producing the same | Kazuyoshi Arai, Tsutomu Takahata, Shinkichi Hasimoto, Masahito Uchida, Yoshinori Harada +1 more | 2012-07-03 |
| 6133178 | High purity transparent silica glass | Shinkichi Hashimoto, Koji Tsukuma, Tomoyuki Akiyama, Yoshikazu Kikuchi, Hideaki Segawa | 2000-10-17 |
| 5676882 | Fluorescent substance and manufacturing method thereof | Masahito Sano | 1997-10-14 |
| 5028967 | Achromatic lens for ultraviolet rays | Koji Tsukuma, Tetsuo Fujii, Hideaki Segawa, Shinichi Kondo, Keishi Honta | 1991-07-02 |