Inventor
David Ramsden
Inventor
Wall, NJ, US
Overview
Patents· 37 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
G01Tprimary
G01TMeasurement of nuclear or x-radiation36%
H04MTelephonic communication28%
H04LTransmission of digital information, e.g. telegraphic communication21%
G01VGeophysics4%
H04BTransmission4%
A61BDiagnosis2%
G01NInvestigating or analysing materials by determining their chemical or physical properties2%
G01RMeasuring electric variables2%
PatentTitleYear
11,009,616Neutron detection202110,429,523Apparatus and methods for gamma ray detection201910,310,102Gamma-ray detector201910,126,442Spherical neutron detector20189,720,111'Neutron detector and method for detecting neutrons'20179,535,177'Gamma-ray spectrometry'20179,485,352'Method for measuring processing delays of voice-over IP devices'20169,465,119'Gamma-ray spectrometer'20169,268,044'Neutron spectrometer'20169,160,842'Method for measuring processing delays of voice-over IP devices'20159,046,613'Radiation detector'20158,938,066'Methods, apparatus and articles of manufacture to cancel echo for communication paths having long bulk delays'20158,917,639'Eliminating false audio associated with VoIP communications'20148,755,411'Systems and methods to measure the performance of a de-jitter buffer'20148,730,852'Eliminating false audio associated with VoIP communications'20148,577,019'Methods, apparatus and articles of manufacture to detect echo during teleconferences'20138,503,311'Method for measuring processing delays of voice-over IP devices'20138,452,002'Methods, apparatus and articles of manufacture to cancel echo for communication paths having long bulk delays'20138,391,126'Method and apparatus for providing echo cancellation in a network'20138,384,016'Stabilization in gamma-ray spectometry'20138,374,993'Radioactive isotope identification'20138,319,188'Gamma-ray detector'20128,125,918'Method and apparatus for evaluating adaptive jitter buffer performance'20128,089,992'Systems and methods to measure the performance of a de-jitter buffer'20127,899,639'Method and apparatus for identifying a fault in a communication path'20117,683,336'Spectrometer with plastic scintillator provided with a specular reflector'20107,602,732'End-to-end connection packet loss detection algorithm using power level deviation'20097,547,887'Gamma ray spectrometers'20097,516,033'Method and apparatus for identifying echo sources in a communication path'20097,504,635'Gamma-ray camera system'20097,202,478'Gamma-ray spectrometry'20077,050,400'End-to-end connection packet loss detection algorithm using power level deviation'20066,940,071'Gamma-ray spectrometry'20056,002,762'Method and apparatus for making nonintrusive noise and speech level measurements on voice calls'19995,875,230'Interactive measurement system and method for telecommunication networks'19995,793,864'Nonintrusive measurement of echo power and echo path delay present on a transmission path'19985,216,702'Nonintrusive speech level and dynamic noise measurements'1993Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1993–2016Based in Wall, NJ, US· patent location history
1998–2006Patents assigned to AT & T CORP (4)· patent assignee history
2005–2019Based in Southampton, GB· patent location history
2007–2021Patents assigned to SYMETRICA LTD (16)· patent assignee history
2007Based in Shirley, GB· patent location history
2009–2016Patents assigned to AT & T IP I LP (14)· patent assignee history
2012–2016Patents assigned to RAMSDEN DAVID (12)· patent assignee history
2012–2014Patents assigned to CHEN BING (3)· patent assignee history
2016–2021Based in Southhampton, GB· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| SYMETRICA LTD | 16 | 2007–2021 |
| AT & T IP I LP | 14 | 2009–2016 |
| RAMSDEN DAVIDself | 12 | 2012–2016 |
| AT & T CORP | 4 | 1998–2006 |
| CHEN BING | 3 | 2012–2014 |
Locations
| Location | Patents | Span |
|---|---|---|
| Wall, New Jersey, US | 20 | 1993–2016 |
| Southampton, GB | 10 | 2005–2019 |
| Southhampton, GB | 6 | 2016–2021 |
| Shirley, GB | 1 | 2007 |