Inventor · disambiguated record
Koji Hirakura
Also filed as: HIRAKURA KOJI
17 granted patents·1 pending application·358 citations·filing 1975–2013
95Inventor score
Top patents by PatentIndex Score
18 records- 0199US6400391B1Optical scanning lens, optical scanning device and image forming apparatusRICOH KK·Filed 2000·Granted Jun 4, 2002·132 cites·48 claims
- 0295US7072127B2Optical scanning lens, optical scanning device and image forming apparatusRICOH KK·Filed 2005·Granted Jul 4, 2006·17 cites·20 claims
- 0393US6744545B2Optical scanning lens, optical scanning device and image forming apparatusRICOH KK·Filed 2002·Granted Jun 1, 2004·37 cites·55 claims
- 0489US4268157AToner image transfer method and apparatus for electrostatic photographyRICOH KK·Filed 1978·Granted May 19, 1981·28 cites·4 claims
- 0587US6870652B2Optical scanning lens, optical scanning device and image forming apparatusRICOH KK·Filed 2004·Granted Mar 22, 2005·21 cites·53 claims
- 0677US8081331B2Image forming apparatusSEKIYA TAKURO·Filed 2006·Granted Dec 20, 2011·5 cites·12 claims
- 0776US4266141AToner developing ability measuring system for electrostatographyRICOH KK·Filed 1979·Granted May 5, 1981·17 cites·19 claims
- 0876US4242434AToner composition for multiple copy electrostatic photographyRICOH KK·Filed 1978·Granted Dec 30, 1980·17 cites·20 claims
- 0975US9378917B2Chip-type fuseMATSUO ELECTRIC CO·Filed 2013·Granted Jun 28, 2016·3 cites·10 claims
- 1071US4389972AToner concentration control apparatusRICOH KK·Filed 1980·Granted Jun 28, 1983·17 cites·4 claims
- 1171US4369733AToner concentration control apparatusRICOH KK·Filed 1980·Granted Jan 25, 1983·17 cites·9 claims
- 1262US4700659ADeveloping unit of dry typeRICOH KK·Filed 1982·Granted Oct 20, 1987·11 cites·11 claims
- 1354US4172722AElectrostatic copying method for forming multiple copiesRICOH KK·Filed 1976·Granted Oct 30, 1979·8 cites·11 claims
- 1452US4367032AElectrostatic copying apparatusRICOH KK·Filed 1981·Granted Jan 4, 1983·8 cites·5 claims
- 1551US4408863ATransfer medium separating deviceRICOH KK·Filed 1981·Granted Oct 11, 1983·8 cites·18 claims
- 1650US4487501AProcess of exposing photosensitive memberRICOH KK·Filed 1982·Granted Dec 11, 1984·7 cites·14 claims
- 1740US2006022910A1Multifunction display deviceSEKIYA TAKURO·Filed 2005·Application pending·0 cites
- 1839US4015984AInorganic photoconductor in glass binds with glass overcoat layerRICOH KK·Filed 1975·Granted Apr 5, 1977·5 cites·5 claims
Join the waitlist — get patent alerts
Get an alert when Koji Hirakura 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 →