Inventor
Yoshio Sakagawa
Inventor
Hyogo, JP
Overview
Patents· 20 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
G03Gprimary
G03GElectrography95%
H04NPictorial communication, e.g. television5%
PatentTitleYear
9,298,127'Developing device and image forming apparatus including same'20168,977,150'Image forming apparatus including a controller configured to regulate a potential difference between a photoconductor and a developing member'20157,907,871'Image forming apparatus'20117,903,993'Image forming apparatus'20117,822,356'Image forming apparatus'20107,796,912'Image forming method and apparatus which uses alternating voltage to form an electric field for moving toner'20107,792,463'Image forming apparatus including a brush member to temporarily capture toner'20107,751,753'Cleanerless image forming apparatus'20107,738,803'Image forming method and apparatus for effectively charging an image carrier'20107,725,054'Electrifying apparatus, a processing unit, and an image formation apparatus'20107,697,875'Development device for developing an electrostatic latent image formed on an image carrying member into a visible image'20107,693,459'Charging device for charging a surface of a latent image bearing member and an image forming apparatus including the charging device'20107,684,732'Process unit and image forming apparatus including the same'20107,664,433'Cleaning of a charging member in an image forming apparatus'20107,263,317'Particle discharge apparatus and image forming apparatus'20076,136,487'Developing method'20005,999,782'Developing device having an AC current with two frequencies and method of using same'19995,884,131'Developing device which accomplishes development using the action of an alternating current field between a developer-carrying member and an image-carrying member'19995,860,040'Developing apparatus having stop period during which no AC electric field is exerted between developer carrying member and image carrying member'19995,724,641'Image forming apparatus comprising a stapler relatively movable in the positions of the original discharge tray and the sheet discharge trays'1998Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1998–2000Patents assigned to MINOLTA CO LTD (5)· patent assignee history
1998Based in Takatsuki, JP· patent location history
1999–2000Based in Ibaraki, JP· patent location history
2007–2016Based in Hyogo, JP· patent location history
2010Patents assigned to RICOH KK (10)· patent assignee history
2010Based in Ashiya, JP· patent location history
2011–2016Patents assigned to RICOH CO LTD (4)· patent assignee history
2015–2016Patents assigned to MURAYAMA SHIN (2)· patent assignee history
2015–2016Patents assigned to SAKAGAWA YOSHIO (2)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| RICOH KK | 10 | 2010 |
| MINOLTA CO LTD | 5 | 1998–2000 |
| RICOH CO LTD | 4 | 2011–2016 |
| MURAYAMA SHIN | 2 | 2015–2016 |
| SAKAGAWA YOSHIOself | 2 | 2015–2016 |
Locations
| Location | Patents | Span |
|---|---|---|
| Hyogo, JP | 10 | 2007–2016 |
| Ashiya, JP | 5 | 2010 |
| Ibaraki, JP | 4 | 1999–2000 |
| Takatsuki, JP | 1 | 1998 |