Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6405563 | Opaque silica glass article having transparent portion and process for producing same | Hiroya Nagata, Masayuki Kudo, Koji Tsukuma, Tomoyuki Akiyama | 2002-06-18 |
| 6133178 | High purity transparent silica glass | Nobusuke Yamada, Shinkichi Hashimoto, Koji Tsukuma, Tomoyuki Akiyama, Hideaki Segawa | 2000-10-17 |
| 5665133 | Process for production of pure transparent quartz | Koichi Orii, Yukinobu Hara, Tomoyuki Akiyama, Koji Tsukuma | 1997-09-09 |
| 5585173 | High-purity, opaque quartz glass, method for producing same and use thereof | Kenji Kamo, Kouichi Ono, Koji Tsukuma, Hiroya Nagata, Emiko Abe +1 more | 1996-12-17 |
| 4713092 | Electrostatic precipitator | Reiro Nakao | 1987-12-15 |
| D274705 | Dial gage | Shingo Nishina, Hiroshi Koizumi, Yoshio Sanoki | 1984-07-17 |
| D261370 | Dial gauge | — | 1981-10-20 |