Issued Patents All Time
Showing 1–25 of 25 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6285800 | Apparatus and method for processing image | Tsutomu Yamazaki, Kentaro Katori, Shinichi Takemoto | 2001-09-04 |
| 5960237 | Apparatus and method for removing foreign materials lodged inside an image forming system | Hitoshi Sekino | 1999-09-28 |
| 5315351 | Image forming apparatus | Moriyoshi Matsushiro, Tsugihito Yoshiyama | 1994-05-24 |
| 5243390 | Device for conveying developer in a developing device | Shinichi Takemoto, Hirofumi Hasegawa, Tateki Oka, Hiroshi Goto, Narutaka Yoshida | 1993-09-07 |
| 5138385 | Developing device with electrically floating developing roller | Tateki Oka | 1992-08-11 |
| 5047805 | Developing device having a space for receiving and increasing pressure of toner received therein | Tateki Oka, Hiroshi Goto, Hirofumi Hasegawa, Kenji Miyashita | 1991-09-10 |
| 5012285 | Developing apparatus including a partitioning arrangement for partitioning the toner accommodating tank | Tateki Oka, Tomoaki Yokoyama, Hiroshi Mizuno, Hiroshi Murasaki, Akihito Ikegawa +2 more | 1991-04-30 |
| 5003917 | Developing apparatus with image quality control | Tateki Oka, Hiroshi Goto | 1991-04-02 |
| 4975348 | Image highlighting method | Kenji Tabuchi, Hiroshi Okamoto, Kaoru Takebe, Shoichi Tsuge | 1990-12-04 |
| 4954843 | Electrophotographic image forming apparatus | Tateki Oka, Kunio Toda | 1990-09-04 |
| 4912513 | Developing apparatus with variable developing bias voltage | Tateki Oka, Tomoaki Yokoyama | 1990-03-27 |
| 4897331 | Reversal image forming method | Hiroshi Okamoto, Kenji Tabuchi, Kaoru Takebe, Tomoaki Yokoyama | 1990-01-30 |
| 4891287 | Image editing method | Hiroshi Okamoto, Kenji Tabuchi, Kaoru Takebe, Tomoaki Yokoyama | 1990-01-02 |
| 4847658 | Image forming apparatus and image forming method employed therefor | Kaoru Takebe, Hiroshi Okamoto, Kenji Tabuchi, Mineyuki Sako | 1989-07-11 |
| 4845524 | Image forming method | Hiroshi Okamoto, Kenji Tabuchi, Kaoru Takebe, Taisuke Nagao | 1989-07-04 |
| 4835566 | Electrophotographic copying apparatus | Tateki Oka, Tomoaki Yokoyama | 1989-05-30 |
| 4828953 | Method for the formation of outline images corresponding to the peripheral outlines of document's images | Tateki Oka, Tomoaki Yokoyama | 1989-05-09 |
| 4821071 | Electrophotographic copiers | Tateki Oka, Hisashi Myochin, Tomoaki Yokoyama | 1989-04-11 |
| 4821076 | Electro-static photo-copier machine | Takeki Oka | 1989-04-11 |
| 4794062 | Method for the formation of outline images corresponding to the peripheral outlines of document's images | Tateki Oka, Tomoaki Yokoyama | 1988-12-27 |
| 4792775 | Method for the formation of outline images corresponding to the peripheral outlines of document's images | Tateki Oka, Tomoaki Yokoyama | 1988-12-20 |
| 4785331 | Electrophotographic copying method and apparatus | Tateki Oka, Tomoaki Yokoyama | 1988-11-15 |
| 4766458 | Developing apparatus for use in image-forming system and developing process employing said developing apparatus | Tateki Oka, Tomoaki Yokoyama | 1988-08-23 |
| 4745437 | Copier machines | Tateki Oka, Tomoaki Yokoyama | 1988-05-17 |
| 4572102 | Method of controlling replenishment of toners | Shizuo Yuge, Tateki Oka, Susumu Sakakibara | 1986-02-25 |