Issued Patents All Time
Showing 1–22 of 22 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8085938 | Secret information management scheme based on secret sharing scheme | Makoto Kagaya, Toshihiko Ogihara | 2011-12-27 |
| 7616766 | Data division method and device using exclusive or calculation | Toshihiko Ogihara | 2009-11-10 |
| 7079793 | Image forming apparatus and image forming method | Takafumi Amano, Tetsuo Kato, Takashi Ikeda, Yukie Kobayashi | 2006-07-18 |
| 7031644 | Image forming apparatus | Takashi Ikeda | 2006-04-18 |
| 7006784 | Image forming apparatus and toner stirring method | Takashi Ikeda | 2006-02-28 |
| 6584299 | Image forming apparatus | — | 2003-06-24 |
| 6398210 | Sheet cartridge and sheet feeding apparatus | — | 2002-06-04 |
| 6014696 | Method of restricting data access to WWW server so as to permit specific user to refer to successive pages while entrance page is freely acquired by any user | Hidenori Araki, Kiyoshi Kusumoto, Yasuhiro Yamashita | 2000-01-11 |
| D410247 | Supply unit for supplying a developer for a copying machine | — | 1999-05-25 |
| D400915 | Supplying unit for supplying a developer for a copying machine | Moritoshi Matayoshi | 1998-11-10 |
| 5748600 | Rotational optical head for optical recording medium | Manabu Sugano, Naoharu Yanagawa, Hiroshi Suzuki | 1998-05-05 |
| 5673245 | Rotary optical system for guiding and converging divided light beams to a tape recording medium | Naoharu Yanagawa, Fumihiko Sano | 1997-09-30 |
| 5517285 | Developing apparatus in which the developer cartridge or the toner cartridge is mountable | Kozo Matsuyama | 1996-05-14 |
| D358163 | Toner container for an electronic copying machine | — | 1995-05-09 |
| 5233466 | Astigmatism generating device | Takanori Maeda, Eiji Muramatsu | 1993-08-03 |
| 5012283 | Copying apparatus having a lamp to form or erase an image | Mamoru Shimono, Tomoyuki Asada, Taiichi Kawaguchi, Yoichi Taya, Kouji Yukinaga +1 more | 1991-04-30 |
| 4847480 | Focus error detecting apparatus | Takanori Maeda | 1989-07-11 |
| 4815060 | Optical pickup device with tracking and focusing utilizing a photodetector having four regions | — | 1989-03-21 |
| 4731527 | An astigmatic focusing system with optical elements oriented to produce astigmatism in a predetermined direction to maximize detector sensitivity | Takanori Maeda | 1988-03-15 |
| 4521931 | Method for threading filaments on rollers of oxidizing furnace and apparatus therefor | Kosuke Katsuki, Youiti Nishioka | 1985-06-11 |
| 4513408 | Error detecting system of video/audio disc player | Katsuharu Sato | 1985-04-23 |
| 4188812 | Installation for production of continuously cold rolled sheet metal or strip | Hiromasa Hirata, Hisashi Takahashi, Takao Kawanami, Takashi Furuya | 1980-02-19 |