Inventor · disambiguated record
Seiji Maruo
Also filed as: MARUO SEIJI
19 granted patents·365 citations·filing 1991–2008
95Inventor score
Top patents by PatentIndex Score
19 records- 0196US5666599AColor electro-photographic printing apparatusHITACHI LTD·Filed 1995·Granted Sep 9, 1997·81 cites·25 claims
- 0291US6085051ASmall-size color electro-photographic apparatusHITACHI LTD·Filed 1998·Granted Jul 4, 2000·37 cites·18 claims
- 0387US5815775AColor electro-photographic apparatusHITACHI LTD·Filed 1997·Granted Sep 29, 1998·29 cites·24 claims
- 0486US6574451B2Small-size color electro-photographic apparatusHITACHI LTD·Filed 2001·Granted Jun 3, 2003·18 cites·5 claims
- 0583US8340522B2Filter assembly and optical module using sameYU JUHYUN·Filed 2008·Granted Dec 25, 2012·12 cites·11 claims
- 0676US7003241B1Image recording device and an image recording systemRICOH PRINTING SYS LTD·Filed 1999·Granted Feb 21, 2006·35 cites·22 claims
- 0774US5666598AImage forming method and apparatus using energy beam impingement on image forming particles to move the sameHITACHI LTD·Filed 1995·Granted Sep 9, 1997·24 cites·32 claims
- 0870US7864028B2In-vehicle emergency call apparatusDENSO CORP·Filed 2008·Granted Jan 4, 2011·6 cites·20 claims
- 0968US5832333AElectrostatic recording apparatus and electrostatic recording methodHITACHI KOKI KK·Filed 1996·Granted Nov 3, 1998·19 cites·6 claims
- 1059US5959655ALight beam scanning apparatus which controls power and spot shape of light beamHITACHI LTD·Filed 1996·Granted Sep 28, 1999·22 cites·7 claims
- 1158US6271874B1Electrophotographic printer having an image memory, a horizontal scanning fringe correction exposure determining section, a vertical scanning fringe correction exposure determining section, and a switchHITACHI KOKI KK·Filed 2000·Granted Aug 7, 2001·3 cites·5 claims
- 1257US5884119ALight exposure controlling method of electrophotographic apparatus for suppressing fringe in pictureHITACHI LTD·Filed 1997·Granted Mar 16, 1999·12 cites·6 claims
- 1356US5668590AOptical beam scanning system with rotating beam compensationHITACHI LTD·Filed 1994·Granted Sep 16, 1997·13 cites·13 claims
- 1456US5255112AOptical scanning apparatus and systemHITACHI LTD·Filed 1991·Granted Oct 19, 1993·19 cites·34 claims
- 1554US6836632B2Small-size color electro-photographic apparatusHITACHI LTD·Filed 2003·Granted Dec 28, 2004·3 cites·22 claims
- 1651US5809053ASemiconductor laser device and optical printing apparatus using the sameHITACHI LTD·Filed 1996·Granted Sep 15, 1998·16 cites·12 claims
- 1741US6055256ALaser beam printer and semiconductor laser device suitable for a light source thereofHITACHI LTD·Filed 1997·Granted Apr 25, 2000·7 cites·9 claims
- 1840US5737008AElectrophotographic image recording apparatus with photoreceptor exposure controlHITACHI KOKI KK·Filed 1996·Granted Apr 7, 1998·7 cites·5 claims
- 1934US6131000AElectrophotographic printing apparatus using electric potential dividing developmentHITACHI LTD·Filed 1998·Granted Oct 10, 2000·2 cites·6 claims
Join the waitlist — get patent alerts
Get an alert when Seiji Maruo 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 →