Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6091925 | Fixing unit with undirectional clutch mechanism and image forming apparatus with sealing member and agitating mechanism | Katsumi Sugimoto, Tomoaki Tanaka, Katsuya Shimatsu, Yasuhiro Wakabayashi, Katsumi Tateno +1 more | 2000-07-18 |
| 5845184 | Developing unit having improved toner density control | Akira Nagahara, Yoshio Yamaguchi, Toshio Tooda, Haruyasu Watanabe, Sachio Sasaki +4 more | 1998-12-01 |
| 5778285 | Image forming apparatus for collecting residual toner from a drum using an AC voltage | Akira Nagahara, Sachio Sasaki, Mitsuhito Furukawa, Yoshio Yamaguchi, Mitsuru Sato +3 more | 1998-07-07 |
| 5678143 | Image forming apparatus for collecting residual toner from a drum using an AC voltage | Akira Nagahara, Sachio Sasaki, Mitsuhito Furukawa, Yoshio Yamaguchi, Mitsuru Sato +3 more | 1997-10-14 |
| 5572298 | Image forming apparatus having a developing apparatus which includes a partition member for partitioning a developing room and a toner hopper | Akira Nagahara, Sachio Sasaki, Mitsuru Sato, Takefumi Takahashi, Masahiro Wanou +1 more | 1996-11-05 |
| 5467176 | Image forming method and apparatus with magnetic brush | Tsuneo Watanuki, Yasushige Nakamura, Satoshi Takezawa, Norio Sawatari, Akira Nagahara +5 more | 1995-11-14 |
| 5448341 | Image forming apparatus | Akira Nagahara, Sachio Sasaki, Mitsuru Sato, Takefumi Takahashi, Masahiro Wanou +1 more | 1995-09-05 |
| 5200784 | Transferring device controlled for preventing the leading edge of a sheet from being excessively charged | Masatoshi Kimura, Sachio Sasaki, Hideaki Iwasaki, Kunihiko Sato, Masao Konishi +4 more | 1993-04-06 |