Inventor · disambiguated record
Keijiro Umehara
Also filed as: UMEHARA KEIJIRO
3 granted patents·2 pending applications·143 citations·filing 2002–2005
76Inventor score
Top patents by PatentIndex Score
5 records- 0197US7030688B2Low-pass filter for a PLL, phase-locked loop and semiconductor integrated circuitMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2003·Granted Apr 18, 2006·97 cites·43 claims
- 0281US7254507B2Analog circuit automatic calibration systemMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2004·Granted Aug 7, 2007·28 cites·10 claims
- 0373US6982581B2Duty cycle correction circuitMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2003·Granted Jan 3, 2006·18 cites·3 claims
- 0440US2006026479A1Verification vector creating method, and electronic circuit verifying method using the former methodUMEHARA KEIJIRO·Filed 2005·Application pending·0 cites
- 0537US2002175890A1Liquid crystal driver device and liquid crystal driver unitMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2002·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →