P

Inventor

HIRATA MASAKUNI

10 patents
⚠️ This page may combine multiple inventors who share the name “HIRATA MASAKUNI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

NIPPON OIL CO LTD

7 patents
US5744430AApr 28, 1998

Engine oil composition

NIPPON OIL CO LTD123 citations97
US5567342AOct 22, 1996

Lubricating oil composition for internal combustion engines

NIPPON OIL CO LTD31 citations92
US5281347AJan 25, 1994

Lubricating composition for internal combustion engine

NIPPON OIL CO LTD30 citations92
US5739088AApr 14, 1998

Method of lubricating an alcohol-based fuel engine with an engine oil composition

NIPPON OIL CO LTD46 citations91
US5372703ADec 13, 1994

Lubricating oils

NIPPON OIL CO LTD39 citations89
US4131658ADec 26, 1978

Method for atomizing oil and an apparatus therefor

NIPPON OIL CO LTD28 citations81
US5701862ADec 30, 1997

Method and apparatus for replenishing the lubricating oil of an internal combustion engine

NIPPON OIL CO LTD15 citations73

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD

2 patents
US6373958B1Apr 16, 2002

Electrical/mechanical/sound converter and apparatus of electrical/mechanical/sound conversion

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD35 citations92
US3946832AMar 30, 1976

Diaphragm for loud speaker

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD16 citations69

NIPPON MITSUBISHI OIL CORP

1 patent
US6627583B2Sep 30, 2003

Engine oil composition

NIPPON MITSUBISHI OIL CORP3 citations58