Inventor · disambiguated record
Nobuhiko Umezawa
Also filed as: UMEZAWA NOBUHIKO
13 granted patents·338 citations·filing 1993–2005
93Inventor score
Technology areasG03G
Files withRICOH KK13
Top patents by PatentIndex Score
13 records- 0196US6295438B1Method and apparatus for forming an image capable of supplying a proper amount of a lubricant to each image forming sectionRICOH KK·Filed 2000·Granted Sep 25, 2001·80 cites·14 claims
- 0294US5848329AImage forming apparatus having a mounting/dismounting mechanismRICOH KK·Filed 1997·Granted Dec 8, 1998·83 cites·13 claims
- 0386US6775506B2Method and apparatus for image developing capable of effectively forming an even development agent layerRICOH KK·Filed 2001·Granted Aug 10, 2004·28 cites·63 claims
- 0486US5797063AImage forming apparatus and cleaning device for transfer material conveyor beltRICOH KK·Filed 1997·Granted Aug 18, 1998·42 cites·19 claims
- 0584US5374980AColor image forming apparatus utilizing liquid developmentRICOH KK·Filed 1993·Granted Dec 20, 1994·30 cites·18 claims
- 0678US6643486B1Developing device for an image forming apparatusRICOH KK·Filed 2000·Granted Nov 4, 2003·15 cites·32 claims
- 0776US6795674B2Developing device for an image forming apparatusRICOH KK·Filed 2003·Granted Sep 21, 2004·13 cites·32 claims
- 0874US5953568ADeveloping unit for an image forming apparatus having a magnetic rotating blade agitatorRICOH KK·Filed 1998·Granted Sep 14, 1999·24 cites·5 claims
- 0963US7177573B2Image forming apparatus with reversely rotated developer bearing membersRICOH KK·Filed 2004·Granted Feb 13, 2007·8 cites·5 claims
- 1061US7254357B2Method and apparatus for image forming capable of effectively regulating a toner layer, developing mechanism for the apparatus, and a process cartridge provided in the apparatusRICOH KK·Filed 2005·Granted Aug 7, 2007·2 cites·27 claims
- 1149USD554695SToner cartridgeRICOH KK·Filed 2005·Granted Nov 6, 2007·7 cites·1 claims
- 1241USD568928SToner cartridgeRICOH KK·Filed 2005·Granted May 13, 2008·4 cites·1 claims
- 1335USD574426SToner cartridgeRICOH KK·Filed 2005·Granted Aug 5, 2008·2 cites·1 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →