Issued Patents All Time
Showing 26–50 of 63 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5245386 | Contact charging device having a brush restricting member | Masaki Asano, Akihito Ikegawa, Izumi Osawa | 1993-09-14 |
| 5242773 | Photosensitive member having fine cracks in surface protective layer | Kenji Masaki, Seishi Ojima, Isao Doi, Izumi Osawa | 1993-09-07 |
| 5242776 | Organic photosensitive member having fine irregularities on its surface | Isao Doi, Seishi Ojima, Kenji Masaki, Izumi Osawa | 1993-09-07 |
| 5241342 | Image forming apparatus having a charging member and means for protecting the image bearing surface charged by the charging member | Masaki Asano, Akihito Ikegawa, Izumi Osawa | 1993-08-31 |
| 5232799 | Organic photosensitive member comprising a binder resin and a solvent | Izumi Osawa, Isao Doi, Kenji Masaki | 1993-08-03 |
| 5225878 | Image forming apparatus | Masaki Asano, Akihito Ikegawa, Izumi Osawa | 1993-07-06 |
| 5198317 | Organic photosensitive member comprising a charge transport layer with a binder resin and a solvent | Izumi Osawa, Isao Doi, Kenji Masaki | 1993-03-30 |
| 5192974 | Contract charger | Akihito Ikegawa, Masaki Asano, Izumi Osawa | 1993-03-09 |
| 5185629 | Image forming apparatus provided with a cooling arrangement and ozone filter | Kenji Masaki | 1993-02-09 |
| 5168315 | Image forming method for forming images on copier paper having a specific construction using a toner having a specific particle diameter and an image forming device which uses said toner and copier paper | Izumi Osawa, Eiichi Sano | 1992-12-01 |
| 5166018 | Photosensitive member with hydrogen-containing carbon layer | Hideo Hotomi, Izumi Osawa, Mitsutoshi Nakamura | 1992-11-24 |
| 5155002 | Image forming method | Izumi Osawa, Seishi Ojima, Kenji Masaki, Isao Doi | 1992-10-13 |
| 5139906 | Photosensitive medium with a protective layer of amorphous hydrocarbon having an absorption coefficient greater than 10,000 cm.sup.-1 | Isao Doi, Izumi Osawa, Kenji Masaki | 1992-08-18 |
| 5138381 | Image forming apparatus equipped with separating pawl with specified surface roughness | Kenji Masaki, Isao Doi, Izumi Osawa | 1992-08-11 |
| 5125644 | Separating device for sheet-like member including separating pawl coated with amorphous carbon layer | Kenji Masaki, Isao Doi, Izumi Osawa | 1992-06-30 |
| 5043769 | Cleaning device | Izumi Osawa | 1991-08-27 |
| 5000831 | Method of production of amorphous hydrogenated carbon layer | Izumi Osawa, Hideo Hotomi | 1991-03-19 |
| 4971880 | Developer containing halogenated amorphous carbon particles prepared by plasma-polymerization | Hideo Hotomi, Izumi Osawa, Isao Doi, Masanori Fujiwara, Kenji Masaki | 1990-11-20 |
| 4965156 | Photosensitive member having an overcoat layer and process for manufacturing the same | Hideo Hotomi, Kenji Masaki, Izumi Osawa, Masanori Fujiwara, Isao Doi | 1990-10-23 |
| 4950571 | Photosensitive member composed of charge transporting layer and charge generating layer | Hideo Hotomi, Izumi Osawa, Mitsutoshi Nakamura | 1990-08-21 |
| 4939054 | Photosensitive member composed of amorphous carbon charge transporting layer and charge generating layer | Hideo Hotomi, Izumi Osawa, Mitsutoshi Nakamura | 1990-07-03 |
| 4935756 | Electrostatic recording member | Hideo Hotomi | 1990-06-19 |
| 4928125 | Liquid drop ejection apparatus using a magnetic fluid | — | 1990-05-22 |
| 4913993 | Photosensitive member composed of charge transporting layer and charge generating layer | Izumi Osawa, Hideo Hotomi, Mitsutoshi Nakamura | 1990-04-03 |
| 4913994 | Photosensitive member composed of charge transporting layer and charge generating layer | Izumi Osawa, Hideo Hotomi, Mitsutoshi Nakamura | 1990-04-03 |