Inventor · disambiguated record
Isao Umezawa
Also filed as: UMEZAWA ISAO
3 granted patents·48 citations·filing 1985–1988
71Inventor score
Technology areasG11B
Files withSONY CORP3
Top patents by PatentIndex Score
3 records- 0177US4847846ASemiconductor laser chipSONY CORP·Filed 1988·Granted Jul 11, 1989·28 cites·4 claims
- 0258US4837429APhotodetector for use with an optical recording mediumSONY CORP·Filed 1987·Granted Jun 6, 1989·14 cites·13 claims
- 0344US4669071APhoto sensor device and optical pickup deviceSONY CORP·Filed 1985·Granted May 26, 1987·6 cites·21 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →