Issued Patents All Time
Showing 26–35 of 35 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6280522 | Quartz glass crucible for pulling silicon single crystal and production process for such crucible | Hiroyuki Watanabe, Hiroyuki Miyazawa, Satoshi Soeta, Tetsuya Igarashi | 2001-08-28 |
| 6136092 | Quart crucible with large diameter for pulling single crystal and method of producing the same | Shigeo Mizuno, Mitsuo Matsumura, Hiroyuki Watanabe | 2000-10-24 |
| 6106610 | Quartz glass crucible for producing silicone single crystal and method for producing the crucible | Hiroyuki Watanabe | 2000-08-22 |
| 5989021 | Quartz crucible with large diameter for pulling single crystal and method of producing the same | Shigeo Mizuno, Mitsuo Matsumura, Hiroyuki Watanabe | 1999-11-23 |
| 5977000 | High purity opaque silica glass | Akira Fujinoki, Kyoichi Inaki, Nobumasa Yoshida, Tohru Yokota | 1999-11-02 |
| 5917103 | Method of manufacturing crucible for double-crucible crystal growing technique | Hiroyuki Watanabe, Hiroshi Matsui | 1999-06-29 |
| 5885071 | Quartz glass crucible for pulling single crystal | Hiroyuki Watanabe | 1999-03-23 |
| 5772714 | Process for producing opaque silica glass | Akira Fujinoki, Kyoichi Inaki, Nobumasa Yoshida, Tohru Yokota | 1998-06-30 |
| 5766291 | Method for producing heat-resistant synthetic quartz glass | Akira Fujinoki | 1998-06-16 |
| 5637284 | Process for continuous refining of quartz powder | Hiroyuki Watanabe, Werner Ponto | 1997-06-10 |