Inventor · disambiguated record
Arata Koyama
Also filed as: KOYAMA ARATA
5 granted patents·23 citations·filing 1982–1996
76Inventor score
Technology areasG11B
Top patents by PatentIndex Score
5 records- 0154US4414245AProcess for producing cobalt containing ferromagnetic iron oxidesISHIHARA MINING & CHEMICAL CO·Filed 1982·Granted Nov 8, 1983·9 cites·8 claims
- 0239US4551327AProcess for producing cobalt-and ferrous iron-containing ferromagnetic iron oxidesISHIHARA SANGYO KAISHA·Filed 1983·Granted Nov 5, 1985·4 cites·12 claims
- 0336US4486467AProcess for producing cobalt-containing magnetic iron oxide powderISHIHARA MINING & CHEMICAL CO·Filed 1982·Granted Dec 4, 1984·3 cites·17 claims
- 0435US5609789ACobalt-containing magnetic iron oxide and process for producing the sameISHIHARA SANGYO KAISHA·Filed 1996·Granted Mar 11, 1997·4 cites·9 claims
- 0533US5041307AProcess for producing magnetic iron oxide particles for magnetic recordingISHIHARA MINING & CHEMICAL CO·Filed 1989·Granted Aug 20, 1991·3 cites·24 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →