Inventor · disambiguated record
David M. Williamson
Also filed as: WILLIAMSON DAVID · WILLIAMSON DAVID M · WILLIAMSON DAVID MICHAEL
43 granted patents·16 pending applications·945 citations·filing 1988–2025
98Inventor score
Files withNIKON CORP31SVG LITHOGRAPHY SYSTEMS INC6WILLIAMSON DAVID M6ALLAN ROBERT EDWARD3BP OIL INT LTD2
Top patents by PatentIndex Score
59 records- 0198US5815310AHigh numerical aperture ring field optical reduction systemSVG LITHOGRAPHY SYSTEMS INC·Filed 1995·Granted Sep 29, 1998·238 cites·18 claims
- 0297US5537260ACatadioptric optical reduction system with high numerical apertureSVG LITHOGRAPHY SYSTEMS INC·Filed 1993·Granted Jul 16, 1996·168 cites·31 claims
- 0395US7362508B2Projection optical system and method for photolithography and exposure apparatus and method using sameNIKON CORP·Filed 2003·Granted Apr 22, 2008·46 cites·77 claims
- 0494US4953960AOptical reduction systemWILLIAMSON DAVID M·Filed 1988·Granted Sep 4, 1990·113 cites·15 claims
- 0593US7527192B1Network based method of providing access to informationAT & T CORP·Filed 2005·Granted May 5, 2009·78 cites·18 claims
- 0689US5956192AFour mirror EUV projection opticsSVG LITHOGRAPHY SYSTEMS INC·Filed 1997·Granted Sep 21, 1999·76 cites·14 claims
- 0788US10607188B2Systems and methods for assessing structured interview responsesEDUCATIONAL TESTING SERVICE·Filed 2015·Granted Mar 31, 2020·19 cites·23 claims
- 0888US5212593ABroad band optical reduction system using matched multiple refractive element materialsSVG LITHOGRAPHY SYSTEMS INC·Filed 1992·Granted May 18, 1993·85 cites·13 claims
- 0986US11049409B1Systems and methods for treatment of aberrant responsesEDUCATIONAL TESTING SERVICE·Filed 2015·Granted Jun 29, 2021·9 cites·7 claims
- 1085US8705170B2High NA catadioptric imaging optics for imaging A reticle to a pair of imaging locationsWILLIAMSON DAVID M·Filed 2009·Granted Apr 22, 2014·15 cites·14 claims
- 1184US11934105B2Optical objective for operation in EUV spectral regionNIKON CORP·Filed 2019·Granted Mar 19, 2024·2 cites·44 claims
- 1284US7701640B2Projection optical system and method for photolithography and exposure apparatus and method using sameNIKON CORP·Filed 2007·Granted Apr 20, 2010·8 cites·17 claims
- 1383US10359618B2Multispectral stereoscopic endoscope system and use of sameNIKON CORP·Filed 2016·Granted Jul 23, 2019·4 cites·24 claims
- 1483US2025339026A1Optical system for convertible imaging of posterior and anterior portions of the eyeNIKON CORP·Filed 2025·Application pending·0 cites
- 1581US6486940B1High numerical aperture catadioptric lensSVG LITHOGRAPHY SYSTEMS INC·Filed 2000·Granted Nov 26, 2002·23 cites·20 claims
- 1680US10747117B2Extreme ultraviolet lithography system that utilizes pattern stitchingNIKON CORP·Filed 2019·Granted Aug 18, 2020·1 cites·20 claims
- 1778US11717161B2Wide-angle pupil relay for cellphone-based fundus cameraNIKON CORP·Filed 2019·Granted Aug 8, 2023·2 cites·16 claims
- 1878US9625368B2Apparatus, optical assembly, method for inspection or measurement of an object and method for manufacturing a structureGOODWIN ERIC PETER·Filed 2011·Granted Apr 18, 2017·5 cites·27 claims
- 1978US5966216AOn-axix mask and wafer alignment systemSVG LITHOGRAPHY SYSTEMS INC·Filed 1994·Granted Oct 12, 1999·32 cites·17 claims
- 2077US10890849B2EUV lithography system for dense line patterningNIKON CORP·Filed 2017·Granted Jan 12, 2021·1 cites·18 claims
- 2177US10295911B2Extreme ultraviolet lithography system that utilizes pattern stitchingNIKON CORP·Filed 2017·Granted May 21, 2019·1 cites·31 claims
- 2277US7909245B1Network based method of providing access to informationAT & T IP II LP·Filed 2009·Granted Mar 22, 2011·11 cites·11 claims
- 2376US11099483B2Euv lithography system for dense line patterningNIKON CORP·Filed 2017·Granted Aug 24, 2021·1 cites·29 claims
- 2475US12156698B2Wide-angle pupil relay for cellphone-based fundus cameraNIKON CORP·Filed 2023·Granted Dec 3, 2024·0 cites·9 claims
- 2571US11300884B2Illumination system with curved 1d-patterned mask for use in EUV-exposure toolNIKON CORP·Filed 2019·Granted Apr 12, 2022·1 cites·46 claims
- 2671US8842296B2Methods and devices for reducing errors in Goos-Hänchen corrections of displacement dataNIKON CORP·Filed 2013·Granted Sep 23, 2014·1 cites·32 claims
- 2771US2024350006A1Ophthalmic optical system, ophthalmic objective lens, and ophthalmic deviceNIKON CORP·Filed 2024·Application pending·0 cites
- 2869US12383133B2Optical system for convertible imaging of posterior and anterior portions of the eyeNIKON CORP·Filed 2021·Granted Aug 12, 2025·0 cites·6 claims
- 2966US10139610B2Broadband catadioptric microscope objective with small central obscurationNIKON CORP·Filed 2016·Granted Nov 27, 2018·1 cites·13 claims
- 3062US9703085B2Catadioptric imaging systems for digital scannerNIKON CORP·Filed 2014·Granted Jul 11, 2017·0 cites·33 claims
- 3162US7936260B2Identifying redundant alarms by determining coefficients of correlation between alarm categoriesAT & T IP I LP·Filed 2008·Granted May 3, 2011·2 cites·20 claims
- 3260US9335159B2Methods and devices for reducing errors in Goos-Hänchen corrections of displacement dataNIKON CORP·Filed 2014·Granted May 10, 2016·0 cites·29 claims
- 3359US2019113723A1High na (numerical aperture) rectangular field euv catoptric projection optics using tilted and decentered zernike polynomial mirror surfacesNIKON CORP·Filed 2018·Application pending·0 cites
- 3458US10488638B2Catadioptric imaging systems for digital scannerNIKON CORP·Filed 2017·Granted Nov 26, 2019·0 cites·22 claims
- 3557US12059210B2Ophthalmic optical system, ophthalmic objective lens, and ophthalmic deviceNIKON CORP·Filed 2020·Granted Aug 13, 2024·0 cites·3 claims
- 3657US2014218704A1High na (numerical aperture) rectangular field euv catoptric projection optics using tilted and decentered zernike polynomial mirror surfacesNIKON CORP·Filed 2014·Application pending·0 cites
- 3756US11054745B2Illumination system with flat 1D-patterned mask for use in EUV-exposure toolNIKON CORP·Filed 2019·Granted Jul 6, 2021·0 cites·18 claims
- 3855US7612892B2Imaging optical system configured with through the lens optics for producing control informationNIKON CORP·Filed 2006·Granted Nov 3, 2009·1 cites·36 claims
- 3953US9083144B2Array comprising a plurality of adjustable optical devicesBUSICO GIACINTO·Filed 2010·Granted Jul 14, 2015·1 cites·24 claims
- 4053US8305559B2Exposure apparatus that utilizes multiple masksWILLIAMSON DAVID M·Filed 2009·Granted Nov 6, 2012·0 cites·32 claims
- 4151US11317798B2Catadioptric unit-magnification afocal pupil relay and optical imaging system employing the sameNIKON CORP·Filed 2019·Granted May 3, 2022·0 cites·13 claims
- 4251US9638906B2Catadioptric imaging systems for digital scannerNIKON CORP·Filed 2014·Granted May 2, 2017·0 cites·22 claims
- 4350US10386626B2Non-telecentric multispectral stereoscopic endoscope objectiveNIKON CORP·Filed 2017·Granted Aug 20, 2019·0 cites·19 claims
- 4448US11685873B2Methods and uses for controlling deposits on valves in direct-injection spark-ignition enginesBP OIL INT·Filed 2014·Granted Jun 27, 2023·0 cites·4 claims
- 4548US8317344B2High NA annular field catoptric projection optics using Zernike polynomial mirror surfacesWILLIAMSON DAVID M·Filed 2010·Granted Nov 27, 2012·0 cites·21 claims
- 4647US8116342B2Variable attenuator device and methodSMITH DANIEL G·Filed 2008·Granted Feb 14, 2012·0 cites·17 claims
- 4746US2010091257A1Optical Imaging System and Method for Imaging Up to Four Reticles to a Single Imaging LocationNIKON CORP·Filed 2009·Application pending·0 cites
- 4846US2009262417A1193nm Immersion MicroscopeNIKON CORP·Filed 2009·Application pending·0 cites
- 4945US2010059657A1System and Method Producing Data For Correcting Autofocus Error in An Imaging Optical SystemNIKON CORP·Filed 2008·Application pending·0 cites
- 5045US2016168498A1Methods and Uses for Intake-Valve and Direct-Injector Deposit Clean-UpALLAN ROBERT EDWARD·Filed 2014·Application pending·0 cites
Showing the top 50 of 59 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →