Inventor · disambiguated record
David Ramsden
Also filed as: RAMSDEN DAVID · RAMSDEN DAVID B · RAMSDEN DAVID BEAUMONT · RAMSDEN DAVID KEITH
37 granted patents·5 pending applications·381 citations·filing 1992–2022
97Inventor score
Top patents by PatentIndex Score
42 records- 0191US6940071B2Gamma-ray spectrometryUNIV SOUTHAMPTON·Filed 2001·Granted Sep 6, 2005·62 cites·29 claims
- 0290US8319188B2Gamma-ray detectorRAMSDEN DAVID·Filed 2007·Granted Nov 27, 2012·27 cites·14 claims
- 0388US7202478B2Gamma-ray spectrometrySYMETRICA LTD·Filed 2005·Granted Apr 10, 2007·24 cites·32 claims
- 0487US9535177B2Gamma-ray spectrometrySYMETRICA LTD·Filed 2013·Granted Jan 3, 2017·8 cites·21 claims
- 0587US5216702ANonintrusive speech level and dynamic noise measurementsAT & T BELL LAB·Filed 1992·Granted Jun 1, 1993·61 cites·21 claims
- 0686US10429523B2Apparatus and methods for gamma ray detectionSYMETRICA LTD·Filed 2014·Granted Oct 1, 2019·7 cites·19 claims
- 0786US10126442B2Spherical neutron detectorSYMETRICA LTD·Filed 2013·Granted Nov 13, 2018·7 cites·15 claims
- 0885US9268044B2Neutron spectrometerRAMSDEN DAVID·Filed 2012·Granted Feb 23, 2016·8 cites·10 claims
- 0984US9720111B2Neutron detector and method for detecting neutronsSYMETRICA LTD·Filed 2014·Granted Aug 1, 2017·5 cites·19 claims
- 1084US9046613B2Radiation detectorRAMSDEN DAVID·Filed 2011·Granted Jun 2, 2015·8 cites·15 claims
- 1182US10310102B2Gamma-ray detectorSYMETRICA LTD·Filed 2014·Granted Jun 4, 2019·6 cites·17 claims
- 1281US7547887B2Gamma ray spectrometersSYMETRICA LTD·Filed 2005·Granted Jun 16, 2009·16 cites·24 claims
- 1380US11009616B2Neutron detectionSYMETRICA LTD·Filed 2018·Granted May 18, 2021·2 cites·18 claims
- 1480US9465119B2Gamma-ray spectrometerSYMETRICA LTD·Filed 2013·Granted Oct 11, 2016·6 cites·13 claims
- 1579US7504635B2Gamma-ray camera systemSYMETRICA LTD·Filed 2004·Granted Mar 17, 2009·21 cites·15 claims
- 1677US7683336B2Spectrometer with plastic scintillator provided with a specular reflectorSYMETRICA LTD·Filed 2007·Granted Mar 23, 2010·9 cites·19 claims
- 1776US8384016B2Stabilization in gamma-ray spectometrySYMETRICA LTD·Filed 2009·Granted Feb 26, 2013·8 cites·14 claims
- 1873US8089992B2Systems and methods to measure the performance of a de-jitter bufferCHEN BING·Filed 2009·Granted Jan 3, 2012·5 cites·4 claims
- 1973US7516033B2Method and apparatus for identifying echo sources in a communication pathAT & T IP I LP·Filed 2006·Granted Apr 7, 2009·4 cites·19 claims
- 2072US8374993B2Radioactive isotope identificationSYMETRICA LTD·Filed 2007·Granted Feb 12, 2013·10 cites·19 claims
- 2170US7602732B1End-to-end connection packet loss detection algorithm using power level deviationAT & T IP II LP·Filed 2005·Granted Oct 13, 2009·4 cites·8 claims
- 2262US7050400B1End-to-end connection packet loss detection algorithm using power level deviationAT & T CORP·Filed 2001·Granted May 23, 2006·8 cites·8 claims
- 2361US8755411B2Systems and methods to measure the performance of a de-jitter bufferCHEN BING·Filed 2011·Granted Jun 17, 2014·1 cites·8 claims
- 2460US8452002B2Methods, apparatus and articles of manufacture to cancel echo for communication paths having long bulk delaysRAMSDEN DAVID·Filed 2009·Granted May 28, 2013·0 cites·20 claims
- 2560US8391126B2Method and apparatus for providing echo cancellation in a networkJAMES JAMES·Filed 2009·Granted Mar 5, 2013·1 cites·17 claims
- 2657US8577019B2Methods, apparatus and articles of manufacture to detect echo during teleconferencesRAMSDEN DAVID·Filed 2009·Granted Nov 5, 2013·0 cites·17 claims
- 2754US9160842B2Method for measuring processing delays of voice-over IP devicesAT & T IP I LP·Filed 2013·Granted Oct 13, 2015·0 cites·20 claims
- 2854US8938066B2Methods, apparatus and articles of manufacture to cancel echo for communication paths having long bulk delaysAT & T IP I LP·Filed 2013·Granted Jan 20, 2015·0 cites·18 claims
- 2953US8503311B2Method for measuring processing delays of voice-over IP devicesRAMSDEN DAVID·Filed 2008·Granted Aug 6, 2013·0 cites·16 claims
- 3052US9485352B2Method for measuring processing delays of voice-over IP devicesAT & T IP I LP·Filed 2015·Granted Nov 1, 2016·0 cites·20 claims
- 3152US8917639B2Eliminating false audio associated with VoIP communicationsAT & T IP I LP·Filed 2014·Granted Dec 23, 2014·0 cites·20 claims
- 3252US7899639B2Method and apparatus for identifying a fault in a communication pathAT & T IP I LP·Filed 2009·Granted Mar 1, 2011·0 cites·17 claims
- 3352US5875230AInteractive measurement system and method for telecommunication networksAT & T CORP·Filed 1996·Granted Feb 23, 1999·29 cites·24 claims
- 3452US2024183999A1Dosimeter apparatus and methodsSYMETRICA LTD·Filed 2022·Application pending·0 cites
- 3550US6002762AMethod and apparatus for making nonintrusive noise and speech level measurements on voice callsAT & T CORP·Filed 1996·Granted Dec 14, 1999·18 cites·24 claims
- 3649US8730852B2Eliminating false audio associated with VoIP communicationsJAMES JAMES·Filed 2009·Granted May 20, 2014·0 cites·13 claims
- 3749US8125918B2Method and apparatus for evaluating adaptive jitter buffer performanceRAMSDEN DAVID·Filed 2008·Granted Feb 28, 2012·0 cites·20 claims
- 3849US2017090049A1Neutron DetectionSYMETRICA LTD·Filed 2015·Application pending·0 cites
- 3948US5793864ANonintrusive measurement of echo power and echo path delay present on a transmission pathAT & T CORP·Filed 1996·Granted Aug 11, 1998·16 cites·42 claims
- 4041US2003014193A1Analysis of catalysed reactions by calorimentryFiled 2001·Application pending·0 cites
- 4139US2012187302A1Gamma-ray spectrometerRAMSDEN DAVID·Filed 2010·Application pending·0 cites
- 4237US2004200966A1Gamma-ray detection apparatus and method for positron emission tomographyFiled 2002·Application pending·0 cites
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