Inventor · disambiguated record
Takahiko Tokumasu
Also filed as: TOKUMASU TAKAHIKO
19 granted patents·2 pending applications·709 citations·filing 1984–2007
96Inventor score
Files withRICOH KK19
Top patents by PatentIndex Score
21 records- 0199US6366751B1Image forming apparatus including preselected range between charge injection layer and voltage potentialRICOH KK·Filed 2000·Granted Apr 2, 2002·182 cites·57 claims
- 0298US7209699B2Lubricant applying unit, process cartridge, image forming apparatus, and image forming methodRICOH KK·Filed 2005·Granted Apr 24, 2007·62 cites·75 claims
- 0397US7251437B2Image formation apparatus having a body to be charged with specified properties and including the use of a protective materialRICOH KK·Filed 2005·Granted Jul 31, 2007·44 cites·24 claims
- 0496US7383013B2Image forming apparatus using a contact or a proximity type of charging system including a protection substance on a moveable body to be chargedRICOH KK·Filed 2007·Granted Jun 3, 2008·18 cites·5 claims
- 0595US7505728B2Lubricant applying unit, process cartridge, image forming apparatus, and image forming methodRICOH KK·Filed 2007·Granted Mar 17, 2009·22 cites·16 claims
- 0695US7496324B2Lubricant applying unit and image forming apparatusRICOH KK·Filed 2005·Granted Feb 24, 2009·23 cites·21 claims
- 0795US7103301B2Image forming apparatus using a contact or a proximity type of charging system including a protection substance on a moveable body to be chargedRICOH KK·Filed 2004·Granted Sep 5, 2006·47 cites·10 claims
- 0893US4614949ATransfer-type thermal printerRICOH KK·Filed 1984·Granted Sep 30, 1986·68 cites·20 claims
- 0992US6987944B2Cleaning device and image forming apparatus using the cleaning deviceRICOH KK·Filed 2002·Granted Jan 17, 2006·40 cites·55 claims
- 1090US7593682B2Image forming apparatus, image forming method, and process cartridgeRICOH KK·Filed 2006·Granted Sep 22, 2009·12 cites·12 claims
- 1190US6721523B2Charging device, image forming unit and image forming deviceRICOH KK·Filed 2002·Granted Apr 13, 2004·35 cites·74 claims
- 1288US7251438B2Image forming apparatus using a contact or a proximity type of charging system including a protection substance on a moveable body to be chargedRICOH KK·Filed 2006·Granted Jul 31, 2007·8 cites·6 claims
- 1382US5955228AMethod and apparatus for forming a powder imageRICOH KK·Filed 1997·Granted Sep 21, 1999·46 cites·14 claims
- 1479US6398345B1Image forming method and an apparatus for the same, and a cleaning deviceRICOH KK·Filed 1998·Granted Jun 4, 2002·40 cites·29 claims
- 1572US7058335B2Process cartridge and image forming apparatus with toner fed cleaning modeRICOH KK·Filed 2003·Granted Jun 6, 2006·12 cites·28 claims
- 1667US7295788B2Image forming apparatus and process cartridgeRICOH KK·Filed 2005·Granted Nov 13, 2007·3 cites·10 claims
- 1763US5040206ACommunication apparatus having driving mechanism and speaker-phoneRICOH KK·Filed 1990·Granted Aug 13, 1991·22 cites·18 claims
- 1861US5208607AThermal recording method using drive signal pulse widths changed at time intervals within thermal head temperature measuring time intervalsRICOH KK·Filed 1991·Granted May 4, 1993·19 cites·4 claims
- 1958US7113726B2Charging device, image forming process cartridge, and image forming apparatus including the charging deviceRICOH KK·Filed 2003·Granted Sep 26, 2006·6 cites·29 claims
- 2037US2002090229A1Image forming apparatusFiled 2001·Application pending·0 cites
- 2137US2002081128A1Image forming apparatusFiled 2001·Application pending·0 cites
Join the waitlist — get patent alerts
Get an alert when Takahiko Tokumasu files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →