Inventor · disambiguated record
Masakuni Hirata
Also filed as: HIRATA MASAKUNI
10 granted patents·366 citations·filing 1974–2001
92Inventor score
Top patents by PatentIndex Score
10 records- 0197US5744430AEngine oil compositionNIPPON OIL CO LTD·Filed 1996·Granted Apr 28, 1998·123 cites·11 claims
- 0288US5739088AMethod of lubricating an alcohol-based fuel engine with an engine oil compositionNIPPON OIL CO LTD·Filed 1994·Granted Apr 14, 1998·46 cites·12 claims
- 0384US5281347ALubricating composition for internal combustion engineNIPPON OIL CO LTD·Filed 1992·Granted Jan 25, 1994·30 cites·6 claims
- 0483US5372703ALubricating oilsNIPPON OIL CO LTD·Filed 1993·Granted Dec 13, 1994·39 cites·14 claims
- 0576US5567342ALubricating oil composition for internal combustion enginesNIPPON OIL CO LTD·Filed 1995·Granted Oct 22, 1996·31 cites·16 claims
- 0675US6373958B1Electrical/mechanical/sound converter and apparatus of electrical/mechanical/sound conversionMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1999·Granted Apr 16, 2002·35 cites·14 claims
- 0768US3946832ADiaphragm for loud speakerMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1974·Granted Mar 30, 1976·16 cites·5 claims
- 0866US4131658AMethod for atomizing oil and an apparatus thereforNIPPON OIL CO LTD·Filed 1978·Granted Dec 26, 1978·28 cites·10 claims
- 0953US5701862AMethod and apparatus for replenishing the lubricating oil of an internal combustion engineNIPPON OIL CO LTD·Filed 1995·Granted Dec 30, 1997·15 cites·9 claims
- 1052US6627583B2Engine oil compositionNIPPON MITSUBISHI OIL CORP·Filed 2001·Granted Sep 30, 2003·3 cites·4 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →