Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6259768 | Method of, and apparatus for, carrying out loopback test in exchange | Tomomi Kato, Kazuei Ohnishi, Takamitsu Saito, Kosei Mano | 2001-07-10 |
| 6192485 | Redundant apparatus | Kazuei Ohnishi, Takamitsu Saito | 2001-02-20 |
| 6147972 | Method and system for achieving cell diagnosis of continuity in cell exchange | Kazuei Onishi | 2000-11-14 |
| 5335306 | Ultraviolet resistant silica glass fiber | Hiroyuki Hayami, Koichi Suzuki | 1994-08-02 |
| 5302556 | Synthetic silica glass articles and a method for manufacturing them | Takaaki Shimizu | 1994-04-12 |
| 5175199 | High transparency silica-titania glass beads, method for making, and light transmission epoxy resin compositions | Eiichi Asano, Takaaki Shimizu, Toshio Shiobara, Koji Futatsumori, Kazuhiro Arai | 1992-12-29 |
| 5141786 | Synthetic silica glass articles and a method for manufacturing them | Takaaki Shimizu | 1992-08-25 |
| 5063181 | Synthetic silica glass article for dopant-diffusion process in semiconductors | Takaaki Shimizu | 1991-11-05 |
| 5021073 | Method of manufacturing synthetic silica glass | Takaaki Shimizu | 1991-06-04 |
| 5013585 | Method for the preparation of surface-modified silica particles | Takaaki Shimizu, Tsutomu Ogihara | 1991-05-07 |
| 4979973 | Preparation of fused silica glass by hydrolysis of methyl silicate | Takaaki Shimizu | 1990-12-25 |