Inventor · disambiguated record
Masaharu Hirai
Also filed as: HIRAI MASAHARU
6 granted patents·1 pending application·125 citations·filing 1982–2019
82Inventor score
Top patents by PatentIndex Score
7 records- 0192US5585032AFerromagnetic fine powder for magnetic recordingISHIHARA SANGYO KAISHA·Filed 1995·Granted Dec 17, 1996·103 cites·9 claims
- 0265US8944110B2Vent ductROKI CO LTD·Filed 2013·Granted Feb 3, 2015·3 cites·7 claims
- 0346US5246609AProcess for preparing ferromagnetic fine particles for magnetic recordingISHIHARA SANGYO KAISHA·Filed 1992·Granted Sep 21, 1993·7 cites·22 claims
- 0445US2020132236A1Piping unit with heat exchange structureROKI CO LTD·Filed 2019·Application pending·0 cites
- 0543US4501774AProcess for the production of cobalt-containing magnetic iron oxide powderISHIHARA MINING & CHEMICAL CO·Filed 1982·Granted Feb 26, 1985·5 cites·12 claims
- 0637US4594267AProcess for producing cobalt-containing magnetic iron oxide powderISHIHARA MINING & CHEMICAL CO·Filed 1985·Granted Jun 10, 1986·4 cites·4 claims
- 0736US4486467AProcess for producing cobalt-containing magnetic iron oxide powderISHIHARA MINING & CHEMICAL CO·Filed 1982·Granted Dec 4, 1984·3 cites·17 claims
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →