Inventor · disambiguated record
Yukiyasu Nishikawa
Also filed as: NISHIKAWA YUKIYASU
5 granted patents·30 citations·filing 1976–1984
76Inventor score
Top patents by PatentIndex Score
5 records- 0145US4083055AExposure information quantizing circuit utilizing shift registerASAHI OPTICAL CO LTD·Filed 1976·Granted Apr 4, 1978·3 cites·9 claims
- 0235US4486080ADevice for detecting blinking of an eye under examinationASAHI OPTICAL CO LTD·Filed 1981·Granted Dec 4, 1984·13 cites·1 claims
- 0331US4432617AEye refractive error measuring deviceASAHI OPTICAL CO LTD·Filed 1981·Granted Feb 21, 1984·9 cites·5 claims
- 0427US4540253AMethod and device for measuring eye refraction errorsASAHI OPTICAL CO LTD·Filed 1984·Granted Sep 10, 1985·5 cites·12 claims
- 0517US4080610AExposure-time control system having a closed-loop circuit arrangement for providing a timing control signalASAHI·Filed 1976·Granted Mar 21, 1978·0 cites·9 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →