Inventor · disambiguated record
David C. Chu
Also filed as: CHU DAVID · CHU DAVID C · CHU DAVID C K · CHU DAVID CHAU-KWONG
27 granted patents·3 pending applications·573 citations·filing 1974–2013
97Inventor score
Top patents by PatentIndex Score
30 records- 0196US4613951ATime interval measuring apparatus and methodHEWLETT PACKARD CO·Filed 1984·Granted Sep 23, 1986·103 cites·7 claims
- 0295US4164648ADouble vernier time interval measurement using triggered phase-locked oscillatorsHEWLETT PACKARD CO·Filed 1978·Granted Aug 14, 1979·68 cites·9 claims
- 0393US3957353AMultiemulsion transparency providing separate phase and amplitude controlUNIV LELAND STANFORD JUNIOR·Filed 1974·Granted May 18, 1976·59 cites·27 claims
- 0488US6738143B2System and method for interferometer non-linearity compensationAGILENT TECHNOLOGIES INC·Filed 2001·Granted May 18, 2004·40 cites·25 claims
- 0587US5166959APicosecond event timerHEWLETT PACKARD CO·Filed 1991·Granted Nov 24, 1992·64 cites·20 claims
- 0683US4519091AData capture in an uninterrupted counterHEWLETT PACKARD CO·Filed 1983·Granted May 21, 1985·25 cites·7 claims
- 0772US7230727B2System for sensing an absolute position in two dimensions using a target patternAGILENT TECHNOLOGIES INC·Filed 2005·Granted Jun 12, 2007·5 cites·29 claims
- 0869US6480126B1Phase digitizerAGILENT TECHNOLOGIES INC·Filed 2001·Granted Nov 12, 2002·14 cites·34 claims
- 0969US5384541APrecision timed delay measurement using phaselocked CW techniqueHEWLETT PACKARD CO·Filed 1993·Granted Jan 24, 1995·28 cites·12 claims
- 1063US5663666ADigital phase detectorHEWLETT PACKARD CO·Filed 1996·Granted Sep 2, 1997·26 cites·20 claims
- 1163US3984770AFrequency measurement using phase continuous frequency switchingHEWLETT PACKARD CO·Filed 1975·Granted Oct 5, 1976·14 cites·11 claims
- 1262US7130056B2System and method of using a side-mounted interferometer to acquire position informationAGILENT TECHNOLOGIES INC·Filed 2004·Granted Oct 31, 2006·7 cites·21 claims
- 1360US5128607AConstant events frequency measurement and fast inverse circuitHEWLETT PACKARD CO·Filed 1990·Granted Jul 7, 1992·21 cites·8 claims
- 1460US4996474ADigital gate generation for a signal measurement instrumentHEWLETT PACKARD CO·Filed 1989·Granted Feb 26, 1991·19 cites·10 claims
- 1552US5469466ASystem for highly repeatable clock parameter recovery from data modulated signalsHEWLETT PACKARD CO·Filed 1994·Granted Nov 21, 1995·22 cites·20 claims
- 1651US2004071836A1Edible tongue tatooFiled 2002·Application pending·0 cites
- 1750US3938042AMeasurement averaging counting apparatus employing a randomly phase modulated time base to improve counting resolutionHEWLETT PACKARD CO·Filed 1974·Granted Feb 10, 1976·8 cites·12 claims
- 1849US7436519B2System and method for interferometer non-linearity compensationAGILENT TECHNOLOGIES INC·Filed 2005·Granted Oct 14, 2008·1 cites·29 claims
- 1948US7869662B2System architecture for sensing an absolute position using a target patternAGILENT TECHNOLOGIES INC·Filed 2007·Granted Jan 11, 2011·0 cites·24 claims
- 2047US7489409B2System for sensing an absolute position in two dimensions using a target patternAGILENT TECHNOLOGIES INC·Filed 2007·Granted Feb 10, 2009·0 cites·18 claims
- 2147US6952175B2Phase digitizer for signals in imperfect quadratureAGILENT TECHNOLOGIES INC·Filed 2003·Granted Oct 4, 2005·5 cites·39 claims
- 2241US5982831AFeed forward method and apparatus for generating a clock signalHEWLETT PACKARD CO·Filed 1996·Granted Nov 9, 1999·14 cites·13 claims
- 2340US2002036113A1Speaker cabinet with tuned stress elementsFiled 2001·Application pending·0 cites
- 2439US4383166AAutomatic echo-chamber for measuring single time intervals by replication and averagingHEWLETT PACKARD CO·Filed 1980·Granted May 10, 1983·9 cites·7 claims
- 2537US6792368B2System and method for heterodyne interferometer high velocity type non-linearity compensationAGILENT TECHNOLOGIES INC·Filed 2002·Granted Sep 14, 2004·0 cites·25 claims
- 2637US2005175217A1Using target images to determine a location of a stageFiled 2004·Application pending·0 cites
- 2736US5631933APhase-locked digital synthesizersHEWLETT PACKARD CO·Filed 1996·Granted May 20, 1997·10 cites·4 claims
- 2834US9430996B2Non-fourier spectral analysis for editing and visual display of musicCHU DAVID C·Filed 2013·Granted Aug 30, 2016·0 cites·16 claims
- 2933US5519625ASystem for characterizing phase-modulated signals using a time interval analyzerHEWLETT PACKARD CO·Filed 1994·Granted May 21, 1996·5 cites·18 claims
- 3032US4627268AMethod for calibrating instruments for time interval measurementsHEWLETT PACKARD CO·Filed 1985·Granted Dec 9, 1986·6 cites·11 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →