Issued Patents All Time
Showing 26–29 of 29 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5953567 | Screw pump, toner conveying device using the same and toner filling system | Satoshi Muramatsu, Nobuo Kasahara | 1999-09-14 |
| 5815784 | Cleaning device for an image forming apparatus and a toner collecting device therefor | Nobuo Kasahara, Satoshi Muramatsu | 1998-09-29 |
| 5341196 | Image forming equipment using a toner cartridge | Kouji Ishigaki, Kazuyuki Nakahara, Fumio Kishi | 1994-08-23 |
| 5182601 | Image forming apparatus having toner handling units which are alternatively usable as a developing device or a cleaning device | Shunji Katoh | 1993-01-26 |