Inventor · disambiguated record
Toshitaka Yamaguchi
Also filed as: YAMAGUCHI TOSHITAKA
22 granted patents·782 citations·filing 1993–2016
96Inventor score
Top patents by PatentIndex Score
22 records- 0197US6266501B1Image-forming apparatus having a seal for a developer and a method for detecting a removal of the sealRICOH KK·Filed 2000·Granted Jul 24, 2001·90 cites·44 claims
- 0296US5887224AImage forming device with improved mixing of circulated developer with replensihed tonerRICOH KK·Filed 1997·Granted Mar 23, 1999·97 cites·21 claims
- 0395US6055388AImage forming apparatus and method for obtaining appropriate toner densityRICOH KK·Filed 1998·Granted Apr 25, 2000·83 cites·26 claims
- 0493US6148161AImage forming apparatus with improved toner density controlRICOH KK·Filed 1999·Granted Nov 14, 2000·64 cites·25 claims
- 0593US6144822AImage forming apparatus having detachable transfer roller and discharge deviceRICOH KK·Filed 1999·Granted Nov 7, 2000·63 cites·22 claims
- 0693US6006050AImage forming method and apparatus for controlling amount of supplied toner or agitating timeRICOH KK·Filed 1997·Granted Dec 21, 1999·75 cites·24 claims
- 0791US5915143AImage forming apparatus and method for automatically adjusting toner density in response to humidity variationsRICOH KK·Filed 1997·Granted Jun 22, 1999·55 cites·27 claims
- 0890US5815767AImage forming apparatusRICOH KK·Filed 1997·Granted Sep 29, 1998·44 cites·30 claims
- 0989US5697020AImage forming apparatus for moving a charging roller towards and away from a photoreceptor and a cleaning member for the charging rollerRICOH KK·Filed 1996·Granted Dec 9, 1997·48 cites·16 claims
- 1089US5678125AImage forming apparatusRICOH KK·Filed 1996·Granted Oct 14, 1997·43 cites·28 claims
- 1185US5396319ACleaning device for an image forming apparatusRICOH KK·Filed 1993·Granted Mar 7, 1995·32 cites·22 claims
- 1284US5923935AImage forming apparatus with a folding transfer device support memberRICOH KK·Filed 1996·Granted Jul 13, 1999·36 cites·30 claims
- 1384US5400127AToner recovery system which detects linear movement of a recovered toner transporterRICOH KK·Filed 1993·Granted Mar 21, 1995·30 cites·13 claims
- 1483US9632461B2Image forming apparatus controlling transfer bias based on temperature and humiditySUGIURA KENJI·Filed 2015·Granted Apr 25, 2017·2 cites·31 claims
- 1583US9459564B2Image forming apparatusOHSUGI TATSUYA·Filed 2015·Granted Oct 4, 2016·2 cites·12 claims
- 1680US7657196B2Compact image forming apparatus with a moveable optical sensorRICOH KK·Filed 2008·Granted Feb 2, 2010·6 cites·20 claims
- 1774US8175479B2Transfer device and image forming apparatus having first and second transfer nips and first and second contacting members which apply transfer biasesSAEKI KAZUCHIKA·Filed 2011·Granted May 8, 2012·2 cites·14 claims
- 1874US7813683B2Belt detaching device and image forming apparatus including belt detaching deviceRICOH KK·Filed 2007·Granted Oct 12, 2010·4 cites·18 claims
- 1972US7929877B2Transfer device and image forming apparatus having at least two contacting members applied with corresponding transfer biasesRICOH CO LTD·Filed 2007·Granted Apr 19, 2011·3 cites·10 claims
- 2060US8270875B2Image forming apparatusFUJITA JUNPEI·Filed 2009·Granted Sep 18, 2012·2 cites·24 claims
- 2159US9720355B2Image forming apparatusOHSUGI TATSUYA·Filed 2016·Granted Aug 1, 2017·0 cites·20 claims
- 2250US8086155B2Transfer device and image forming apparatus including sameYAMAGUCHI TOSHITAKA·Filed 2008·Granted Dec 27, 2011·1 cites·8 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →