Issued Patents All Time
Showing 51–75 of 78 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6597494 | Polarization maintaining optical fiber amplifier and optical amplifier | Takeshi Segi, Tomoharu Kitabayashi | 2003-07-22 |
| 6563628 | Gain tilt free optical fiber amplifier in a wide dynamic gain range | Tomoharu Kitabayashi, Takafumi Kashima | 2003-05-13 |
| 6542288 | Optical amplifier utilizing rare earth element-doped optical fibers for temperature compensation | Takeshi Segi, Takuya Aizawa, Takafumi Kashima | 2003-04-01 |
| 6443807 | Polishing process for use in method of fabricating semiconductor device | Yasuaki Tsuchiya | 2002-09-03 |
| 6442313 | Optical fiber grating and manufacturing method thereof | Ryozo Yamauchi, Akira Wada, Nobuyuki Tanaka, Kensuke Shima, Kenji Nishide +1 more | 2002-08-27 |
| 6419962 | External skin treatment composition | Mineyuki Yokoyama, Hiroyuki Tsukada, Shoko Yamaguchi, Yumiko Suzuki, Yasukazu Nakayama +2 more | 2002-07-16 |
| 6298183 | Optical fiber grating and manufacturing method therefor | Ryozo Yamauchi, Akira Wada, Nobuyuki Tanaka, Kensuke Shima, Kenji Nishide +1 more | 2001-10-02 |
| 6285839 | Image forming apparatus having function for automatically adjusting image forming condition | Masaki Tanaka, Futoshi Hamada, Toshifumi Watanabe | 2001-09-04 |
| 6092091 | Device and method for filtering information, device and method for monitoring updated document information and information storage medium used in same devices | Kazuo Sumita, Tatsuya Uehara, Nobuhiro Shimogori, Seiji Miike, Masahiro Kajiura | 2000-07-18 |
| 6052714 | Information filtering apparatus and method for retrieving a selected article from information sources | Seiji Miike, Masahiro Kajiura, Kenji Ono, Kazuo Sumita | 2000-04-18 |
| 5996375 | Method of making an optical waveguide grating with two dissimilar irradiating steps | Michihiro Nakai, Kensuke Shima, Hiroshi Hidaka, Satoshi Okude, Masaaki Sudoh +2 more | 1999-12-07 |
| 5978637 | Image forming apparatus capable of obtaining stable transfer using a particular transfer roller | Yasuo Tanaka, Koji Uno, Kazuyoshi Hara | 1999-11-02 |
| 5949934 | Optical waveguide grating and production method therefor | Kensuke Shima, Michihiro Nakai, Hiroshi Hidaka, Kuniharu Himeno, Satoshi Okude +4 more | 1999-09-07 |
| 5930437 | Optical filter with planar optical waveguide having periodically varied distribution of refractive index and production process thereof | Michihiro Nakai, Kensuke Shima, Hiroshi Hidaka, Satoshi Okude, Masaaki Sudoh +2 more | 1999-07-27 |
| 5920748 | Image forming apparatus capable of estimating toner concentration | Atsushi Kawai, Masaki Tanaka | 1999-07-06 |
| 5907836 | Information filtering apparatus for selecting predetermined article from plural articles to present selected article to user, and method therefore | Kazuo Sumita, Masahiro Kajiura, Kenji Ono, Seiji Miike | 1999-05-25 |
| 5893661 | Image forming apparatus | Yasuo Tanaka, Kazuyoshi Hara | 1999-04-13 |
| 5805956 | Electrophotographic image forming apparatus capable of setting image forming conditions and method for setting image forming conditions in an electrophotographic image forming apparatus | Atsushi Kawai | 1998-09-08 |
| 5778279 | Image forming apparatus estimating a consumable life of a component using fuzzy logic | Atsushi Kawai | 1998-07-07 |
| 5774762 | Image forming apparatus for optimizing toner transfer efficiency | Shinichi Takemoto, Yasuyuki Inada | 1998-06-30 |
| 5761666 | Document retrieval system | Seiji Miike, Kazuo Sumita | 1998-06-02 |
| 5732170 | Optical fiber filter | Satoshi Okude, Akira Wada, Ryozo Yamauchi | 1998-03-24 |
| 5708917 | Toner replenishment device for an image forming apparatus which employs pixel density and toner density information | Atsushi Kawai, Masaki Tanaka, Yukihiko Okuno | 1998-01-13 |
| 5581221 | Electrophotographic image forming apparatus | Atsushi Kawai, Hiroshi Sakakibara, Toshifumi Watanabe, Hiroshi Nishikawa | 1996-12-03 |
| 5530530 | Apparatus for measuring developer density | Masaki Tanaka, Atsushi Kawai, Naoyoshi Kinoshita, Yukihiko Okuno | 1996-06-25 |