Issued Patents All Time
Showing 76–100 of 100 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7295741 | Optical fiber, optical fiber ribbon, and optical interconnection system | Akifumi Sako, Ryuichi Sugizaki | 2007-11-13 |
| 7248399 | Optical fiber for Raman amplification, optical fiber coil, Raman amplifier, and optical communication system | Yuki Taniguchi, Yoshihiro Emori, Ryuichi Sugizaki, Atsushi Oguri | 2007-07-24 |
| 7132702 | Image sensor | Tadashi Narui, Keiichi Akagawa | 2006-11-07 |
| 7126748 | Optical fiber, optical fiber module, and Raman amplifier | Ryuichi Sugizaki, Yuki Taniguchi | 2006-10-24 |
| 7099545 | Single-mode optical fiber | Akifumi Sako, Ryuichi Sugizaki | 2006-08-29 |
| 7079738 | Method for manufacturing a glass doped with a rare earth element and fiber for optical amplification using the same | Toshihiro Nakamura, Keiichi Aiso, Hisashi Koaizawa, Yoko Moriai | 2006-07-18 |
| 7046885 | Optical fiber, Raman amplifier, and optical communication system | Ryuichi Sugizaki | 2006-05-16 |
| 7046433 | Optical fiber, and optical module and Raman amplifier using the optical fiber | Ryuichi Sugizaki | 2006-05-16 |
| 6778748 | Optical fiber, dispersion compensator using the same, and optical transmission system | Ryuichi Sugizaki | 2004-08-17 |
| 6677178 | Semiconductor devices including back-surface-incidence CCD light-sensors, and methods for manufacturing same | — | 2004-01-13 |
| 6671444 | Optical fiber | Shinichi Arai, Kunihiko Mori, Hidehiko Takara, Satoki Kawanishi | 2003-12-30 |
| 6668121 | Optical fiber, and dispersion compensator using same, optical transmission line using same and optical transmission system using same | Ryuichi Sugizaki | 2003-12-23 |
| 6463201 | Light amplification optical fiber and light amplifier using the same | Keiichi Aiso, Yoshio Tashiro | 2002-10-08 |
| 6074287 | Semiconductor wafer polishing apparatus | Akira Miyaji, Takashi Arai | 2000-06-13 |
| 5899792 | Optical polishing apparatus and methods | — | 1999-05-04 |
| 5711903 | Method of manufacturing a porous preform for an optical fiber | Masato Oku, Takayuki Morikawa, Tsuguo Sato, Kazuaki Yoshida | 1998-01-27 |
| 5615295 | Optical fiber and process of producing the same | Kazuaki Yoshida, Takayuki Morikawa | 1997-03-25 |
| 5352259 | Method of manufacturing optical fiber preform | Masato Oku, Noritsugu Enomoto, Hiroshi Hihara, Tsuguo Sato, Kazuaki Yoshida +1 more | 1994-10-04 |
| 5318432 | Apparatus for forming porous preform used to fabricate optical fiber | Tsuguo Satou, Yoshiaki Koinuma, Kazuaki Yoshida | 1994-06-07 |
| 5314520 | Method for manufacturing optical fiber preform | Tsuguo Satoh, Yoshiaki Koinuma, Kazuaki Yoshida | 1994-05-24 |
| 5244485 | Method of manufacturing a silica glass preform | Hiroshi Hihara, Masato Oku, Noritsugu Enomoto, Tsuguo Sato, Kazuaki Yoshida +1 more | 1993-09-14 |
| 5185020 | Method for manufacturing a silica-base material for optical fiber | Tsuguo Satoh, Takayuki Morikawa, Hiroshi Hihara, Kazuaki Yoshida | 1993-02-09 |
| 5169421 | Method of manufacturing silica glass optical waveguide preform | Hiroshi Hihara, Tsuguo Satoh, Takayuki Morikawa, Kazuaki Yoshida | 1992-12-08 |
| 4967406 | Subsignal transmitting system | Toshio Tamura | 1990-10-30 |
| 4888792 | Multi-level quadrature amplitude modulation and demodulation system | Kenzo Kobayashi | 1989-12-19 |