Inventor · disambiguated record
Yoshio Sakagawa
Also filed as: SAKAGAWA YOSHIO
20 granted patents·71 citations·filing 1996–2014
93Inventor score
Technology areasG03G
Top patents by PatentIndex Score
20 records- 0179US8977150B2Image forming apparatus including a controller configured to regulate a potential difference between a photoconductor and a developing memberYAMAMOTO SHIN·Filed 2012·Granted Mar 10, 2015·3 cites·10 claims
- 0278US7684732B2Process unit and image forming apparatus including the sameRICOH KK·Filed 2007·Granted Mar 23, 2010·5 cites·13 claims
- 0377US7738803B2Image forming method and apparatus for effectively charging an image carrierRICOH KK·Filed 2007·Granted Jun 15, 2010·5 cites·20 claims
- 0474US7664433B2Cleaning of a charging member in an image forming apparatusRICOH KK·Filed 2008·Granted Feb 16, 2010·4 cites·12 claims
- 0573US7263317B2Particle discharge apparatus and image forming apparatusSHARP KK·Filed 2005·Granted Aug 28, 2007·4 cites·14 claims
- 0670US7725054B2Electrifying apparatus, a processing unit, and an image formation apparatusRICOH KK·Filed 2007·Granted May 25, 2010·3 cites·12 claims
- 0764US7697875B2Development device for developing an electrostatic latent image formed on an image carrying member into a visible imageRICOH KK·Filed 2008·Granted Apr 13, 2010·2 cites·20 claims
- 0861US7907871B2Image forming apparatusRICOH CO LTD·Filed 2007·Granted Mar 15, 2011·2 cites·18 claims
- 0961US7903993B2Image forming apparatusRICOH CO LTD·Filed 2008·Granted Mar 8, 2011·2 cites·20 claims
- 1061US7822356B2Image forming apparatusRICOH KK·Filed 2008·Granted Oct 26, 2010·2 cites·14 claims
- 1160US5999782ADeveloping device having an AC current with two frequencies and method of using sameMINOLTA CO LTD·Filed 1998·Granted Dec 7, 1999·14 cites·24 claims
- 1255US7751753B2Cleanerless image forming apparatusRICOH KK·Filed 2007·Granted Jul 6, 2010·1 cites·19 claims
- 1353US5724641AImage forming apparatus comprising a stapler relatively movable in the positions of the original discharge tray and the sheet discharge traysMINOLTA CO LTD·Filed 1996·Granted Mar 3, 1998·11 cites·18 claims
- 1451US5860040ADeveloping apparatus having stop period during which no AC electric field is exerted between developer carrying member and image carrying memberMINOLTA CO LTD·Filed 1997·Granted Jan 12, 1999·10 cites·25 claims
- 1545US7792463B2Image forming apparatus including a brush member to temporarily capture tonerRICOH KK·Filed 2008·Granted Sep 7, 2010·0 cites·14 claims
- 1645US7693459B2Charging device for charging a surface of a latent image bearing member and an image forming apparatus including the charging deviceRICOH KK·Filed 2007·Granted Apr 6, 2010·0 cites·14 claims
- 1741US7796912B2Image forming method and apparatus which uses alternating voltage to form an electric field for moving tonerRICOH KK·Filed 2008·Granted Sep 14, 2010·0 cites·20 claims
- 1840US9298127B2Developing device and image forming apparatus including sameSAKAGAWA YOSHIO·Filed 2014·Granted Mar 29, 2016·0 cites·13 claims
- 1934US5884131ADeveloping device which accomplishes development using the action of an alternating current field between a developer-carrying member and an image-carrying memberMINOLTA CO LTD·Filed 1998·Granted Mar 16, 1999·3 cites·15 claims
- 2029US6136487ADeveloping methodMINOLTA CO LTD·Filed 1997·Granted Oct 24, 2000·0 cites·7 claims
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