Inventor · disambiguated record
David G. Welkie
Also filed as: WELKIE DAVID G
35 granted patents·1 pending application·1,079 citations·filing 1984–2020
98Inventor score
Files withPERKINELMER HEALTH SCI INC19ANALYTICA OF BRANFORD INC8PERKIN ELMER CORP4WHITEHOUSE CRAIG M2ANALYTICA OF BRANDFORD INC1
Top patents by PatentIndex Score
36 records- 0199US7858926B1Mass spectrometry with segmented RF multiple ion guides in various pressure regionsPERKINELMER HEALTH SCI INC·Filed 2006·Granted Dec 28, 2010·71 cites·57 claims
- 0299US7365317B2RF surfaces and RF ion guidesANALYTICA OF BRANFORD INC·Filed 2005·Granted Apr 29, 2008·76 cites·140 claims
- 0399US7034292B1Mass spectrometry with segmented RF multiple ion guides in various pressure regionsANALYTICA OF BRANFORD INC·Filed 2003·Granted Apr 25, 2006·222 cites·29 claims
- 0498US7786435B2RF surfaces and RF ion guidesPERKINELMER HEALTH SCI INC·Filed 2008·Granted Aug 31, 2010·60 cites·53 claims
- 0598US7049584B1Fragmentation methods for mass spectrometryANALYTICA OF BRANFORD INC·Filed 2005·Granted May 23, 2006·59 cites·40 claims
- 0697US9613788B2RF ion guide with axial fieldsPERKINELMER HEALTH SCI INC·Filed 2015·Granted Apr 4, 2017·17 cites·24 claims
- 0797US8334507B1Fragmentation methods for mass spectrometryWHITEHOUSE CRAIG M·Filed 2006·Granted Dec 18, 2012·43 cites·21 claims
- 0897US7928361B1Multiple detection systemsPERKINELMER HEALTH SCI INC·Filed 2007·Granted Apr 19, 2011·33 cites·25 claims
- 0997US6919562B1Fragmentation methods for mass spectrometryANALYTICA OF BRANFORD INC·Filed 2003·Granted Jul 19, 2005·76 cites·41 claims
- 1097US6683301B2Charged particle trapping in near-surface potential wellsANALYTICA OF BRANFORD INC·Filed 2002·Granted Jan 27, 2004·75 cites·199 claims
- 1196US10032617B2RF ion guide with axial fieldsPERKINELMER HEALTH SCI INC·Filed 2017·Granted Jul 24, 2018·14 cites·15 claims
- 1294US7321847B1Apparatus and methods for reduction of coherent noise in a digital signal averagerANALYTICA OF BRANFORD INC·Filed 2006·Granted Jan 22, 2008·22 cites·40 claims
- 1393US6872941B1Charged particle trapping in near-surface potential wellsANALYTICA OF BRANFORD INC·Filed 2003·Granted Mar 29, 2005·38 cites·5 claims
- 1491US7265346B2Multiple detection systemsANALYTICA OF BRANDFORD INC·Filed 2002·Granted Sep 4, 2007·46 cites·89 claims
- 1590US10796893B2RF ion guide with axial fieldsPERKINELMER HEALTH SCI INC·Filed 2019·Granted Oct 6, 2020·3 cites·20 claims
- 1689US8921803B2Electrostatic lenses and systems including the sameWELKIE DAVID G·Filed 2012·Granted Dec 30, 2014·13 cites·36 claims
- 1789US4659899AVacuum-compatible air-cooled plasma devicePERKIN ELMER CORP·Filed 1986·Granted Apr 21, 1987·44 cites·19 claims
- 1888US8507850B2Multipole ion guide interface for reduced background noise in mass spectrometryWHITEHOUSE CRAIG M·Filed 2007·Granted Aug 13, 2013·9 cites·13 claims
- 1987US6080985AIon source and accelerator for improved dynamic range and mass selection in a time of flight mass spectrometerPERKIN ELMER CORP·Filed 1997·Granted Jun 27, 2000·54 cites·33 claims
- 2085US10453666B2RF ion guide with axial fieldsPERKINELMER HEALTH SCI INC·Filed 2018·Granted Oct 22, 2019·2 cites·15 claims
- 2184US6180942B1Ion detector, detector array and instrument using samePERKINELMER INSTRUMENTS LLC·Filed 1997·Granted Jan 30, 2001·68 cites·18 claims
- 2282US10879030B2Dynamic electron impact ion sourcePERKINELMER HEALTH SCI INC·Filed 2018·Granted Dec 29, 2020·2 cites·18 claims
- 2378US8686356B2Fragmentation methods for mass spectrometryPERKINELMER HEALTH SCI INC·Filed 2012·Granted Apr 1, 2014·2 cites·20 claims
- 2474US8723107B2Multipole ion guide interface for reduced background noise in mass spectrometryPERKINELMER HEALTH SCI INC·Filed 2013·Granted May 13, 2014·2 cites·13 claims
- 2572US8981290B2Fragmentation methods for mass spectrometryPERKINELMER HEALTH SCI INC·Filed 2014·Granted Mar 17, 2015·1 cites·17 claims
- 2670US11276544B2Dynamic electron impact ion sourcePERKINELMER HEALTH SCI INC·Filed 2020·Granted Mar 15, 2022·0 cites·17 claims
- 2766US4661702APrimary ion beam raster gating technique for secondary ion mass spectrometer systemPERKIN ELMER CORP·Filed 1984·Granted Apr 28, 1987·11 cites·8 claims
- 2858US2015069262A1Electrostatic lenses and systems including the samePERKINELMER HEALTH SCI INC·Filed 2014·Application pending·0 cites
- 2957US7043406B1Apparatus and methods for reduction of coherent noise in a digital signal averagerANALYTICA OF BRANFORD INC·Filed 2003·Granted May 9, 2006·7 cites·49 claims
- 3056US9576782B2Orthogonal acceleration system for time-of-flight mass spectrometerPERKINELMER HEALTH SCI INC·Filed 2015·Granted Feb 21, 2017·0 cites·22 claims
- 3155US9177777B2Orthogonal acceleration system for time-of-flight mass spectrometerPERKINELMER HEALTH SCI INC·Filed 2015·Granted Nov 3, 2015·0 cites·14 claims
- 3253US8975580B2Orthogonal acceleration system for time-of-flight mass spectrometerPERKINELMER HEALTH SCI INC·Filed 2013·Granted Mar 10, 2015·0 cites·19 claims
- 3352US6043488ACarrier gas separator for mass spectroscopyPERKIN ELMER CORP·Filed 1997·Granted Mar 28, 2000·9 cites·18 claims
- 3450US8380775B2Finite differences methodsPERKINELMER HEALTH SCI INC·Filed 2008·Granted Feb 19, 2013·0 cites·8 claims
- 3549US9129790B2Orthogonal acceleration TOF with ion guide modePERKINELMER HEALTH SCI INC·Filed 2014·Granted Sep 8, 2015·0 cites·29 claims
- 3642US10692712B2Ion transfer from electron ionization sourcesPERKINELMER HEALTH SCI INC·Filed 2018·Granted Jun 23, 2020·0 cites·29 claims
Join the waitlist — get patent alerts
Get an alert when David G. Welkie files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →