Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5852757 | Electrophotographic image forming apparatus having a device for recovering residual toner | Yoshio Yamaguchi, Nobuo Kuwabara, Mituru Sato, Haruyasu Watanabe, Akira Nagahara +5 more | 1998-12-22 |
| 5848343 | Electrophotographic image-forming apparatus with uniform toner usage control | Takefumi Takahashi, Shizuo Takano, Yoshio Yamaguchi, Hiroshi Kera, Akira Nagahara +2 more | 1998-12-08 |
| 5845184 | Developing unit having improved toner density control | Akira Nagahara, Yoshio Yamaguchi, Shigenobu Utaka, Haruyasu Watanabe, Sachio Sasaki +4 more | 1998-12-01 |
| 5557371 | Electrophotographic apparatus | — | 1996-09-17 |
| 5512980 | Method of and apparatus for detecting toner empty | Yoshio Yamaguchi | 1996-04-30 |
| 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 |