Inventor · disambiguated record
Yasuaki Umezawa
Also filed as: UMEZAWA YASUAKI
3 granted patents·1 pending application·5 citations·filing 2013–2015
53Inventor score
Files withARISAWA SEISAKUSHO KK4
Top patents by PatentIndex Score
4 records- 0180US9158123B2Light diffraction element and optical low pass filterARISAWA SEISAKUSHO KK·Filed 2013·Granted Oct 13, 2015·5 cites·25 claims
- 0240US9594276B2Optical diffraction element, optical pickup, and optical diffraction element manufacturing methodARISAWA SEISAKUSHO KK·Filed 2013·Granted Mar 14, 2017·0 cites·5 claims
- 0340US2014293417A1Eyeglass component, eyeglasses, and eyeglass component manufacturing methodARISAWA SEISAKUSHO KK·Filed 2014·Application pending·0 cites
- 0432US9760013B2Exposure apparatus, mask, and optical filmARISAWA SEISAKUSHO KK·Filed 2015·Granted Sep 12, 2017·0 cites·12 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →