Inventor · disambiguated record
Hiroshi Sumita
Also filed as: SUMITA HIROSHI
10 granted patents·141 citations·filing 1977–2002
90Inventor score
Files withTODA KOGYO CORP10
Top patents by PatentIndex Score
10 records- 0180US4136158AProduction of acicular magnetic iron oxidesTODA KOGYO CORP·Filed 1977·Granted Jan 23, 1979·21 cites·17 claims
- 0279US6616747B2Process for producing granular hematite particlesTODA KOGYO CORP·Filed 2002·Granted Sep 9, 2003·24 cites·8 claims
- 0373US4136049AProcess for treating acicular magnetite containing co to stabilize the magnetic properties thereofTODA KOGYO CORP·Filed 1977·Granted Jan 23, 1979·16 cites·4 claims
- 0467US4873010ASpindle-like magnetic iron oxide particles and process for producing the sameTODA KOGYO CORP·Filed 1987·Granted Oct 10, 1989·15 cites·20 claims
- 0566US5449565AMagnetic iron oxide particles, a process for producing the same and a magnetic recording mediumTODA KOGYO CORP·Filed 1993·Granted Sep 12, 1995·23 cites·18 claims
- 0662US6117540ANon-magnetic black particles, non-magnetic black pigment therefrom and non-magnetic black filler therefromTODA KOGYO CORP·Filed 2000·Granted Sep 12, 2000·4 cites·8 claims
- 0758US6139618AFine yellow composite iron oxide hydroxide pigment, and paint or resin composition using the sameTODA KOGYO CORP·Filed 1999·Granted Oct 31, 2000·12 cites·13 claims
- 0850US4773931ASpindle ferromagnetic alloy particlesTODA KOGYO CORP·Filed 1987·Granted Sep 27, 1988·12 cites·15 claims
- 0948US6027559AYellow iron oxide hydroxide particles and process for producing the sameTODA KOGYO CORP·Filed 1998·Granted Feb 22, 2000·7 cites·48 claims
- 1040US6087004ANon-magnetic black particles, non-magnetic black pigment therefrom and non-magnetic black filler therefromTODA KOGYO CORP·Filed 1997·Granted Jul 11, 2000·7 cites·11 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →