Inventor · disambiguated record
Yasushi Kumamaru
Also filed as: KUMAMARU YASUSHI
2 granted patents·1 citations·filing 2004–2004
29Inventor score
Technology areasG11B
Files withPIONEER CORP2
Top patents by PatentIndex Score
2 records- 0143US7170831B2Optical pickup astigmatism measuring method, optical pickup astigmatism adjusting method, and optical pickup astigmatism measuring systemPIONEER CORP·Filed 2004·Granted Jan 30, 2007·1 cites·5 claims
- 0235US7064308B2Method of and apparatus for adjusting the focus position of an optical pickupPIONEER CORP·Filed 2004·Granted Jun 20, 2006·0 cites·4 claims
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