Inventor · disambiguated record
Eiichi Katoh
Also filed as: KATOH EIICHI
10 granted patents·428 citations·filing 1987–2015
91Inventor score
Top patents by PatentIndex Score
10 records- 0194US5127005AFault diagnosis expert systemRICOH KK·Filed 1990·Granted Jun 30, 1992·226 cites·13 claims
- 0293US5198861AImage density control method for an image forming apparatus for reducing background contamination of a photoconductive drumRICOH KK·Filed 1992·Granted Mar 30, 1993·57 cites·9 claims
- 0389US5182600AToner end detecting method for an electrophotographic copierRICOH KK·Filed 1991·Granted Jan 26, 1993·43 cites·8 claims
- 0487US7865090B2Maintenance management system and image forming apparatusRICOH CO LTD·Filed 2008·Granted Jan 4, 2011·10 cites·9 claims
- 0587US4916491AControl device for a copierRICOH KK·Filed 1988·Granted Apr 10, 1990·33 cites·5 claims
- 0681US10832226B2System and service determination methodRICOH CO LTD·Filed 2015·Granted Nov 10, 2020·4 cites·14 claims
- 0775US4952976ACopier with a toner supply deviceRICOH KK·Filed 1988·Granted Aug 28, 1990·21 cites·4 claims
- 0860US4959687ABias power source controller for an image forming apparatusRICOH KK·Filed 1988·Granted Sep 25, 1990·13 cites·3 claims
- 0958US4719491ACopierRICOH KK·Filed 1987·Granted Jan 12, 1988·11 cites·2 claims
- 1056US4965637AControl device for an image forming apparatusRICOH KK·Filed 1989·Granted Oct 23, 1990·10 cites·4 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →