Inventor · disambiguated record
David Stevenson Spain, Jr.
Also filed as: SPAIN DAVID · SPAIN DAVID S · SPAIN DAVID S JR · SPAIN DAVID STEVENSON
53 granted patents·7 pending applications·2,254 citations·filing 2000–2025
99Inventor score
Files withPOLARIS WIRELESS INC31HEARTFLOW INC16BHATTACHARYA TARUN KUMAR5ALLEGRA MANLIO2BANSAL ANKIT1
Top patents by PatentIndex Score
60 records- 0198US11948695B2Systems and methods for identifying and modeling unresolved vessels in image-based patient-specific hemodynamic modelsHEARTFLOW INC·Filed 2022·Granted Apr 2, 2024·11 cites·20 claims
- 0298US11707325B2System and methods for estimation of blood flow using response surface and reduced order modelingHEARTFLOW INC·Filed 2020·Granted Jul 25, 2023·25 cites·18 claims
- 0398US11660143B2Systems and methods for diagnosis and assessment of cardiovascular disease by comparing arterial supply capacity to end-organ demandHEARTFLOW INC·Filed 2021·Granted May 30, 2023·26 cites·20 claims
- 0498US11521755B2Systems and methods for identifying and modeling unresolved vessels in image-based patient-specific hemodynamic modelsHEARTFLOW INC·Filed 2021·Granted Dec 6, 2022·58 cites·20 claims
- 0598US10990652B2Systems and methods for identifying and modeling unresolved vessels in image-based patient-specific hemodynamic modelsHEARTFLOW INC·Filed 2018·Granted Apr 27, 2021·64 cites·20 claims
- 0698US6393294B1Location determination using RF fingerprintingPOLARIS WIRELESS INC·Filed 2000·Granted May 21, 2002·451 cites·36 claims
- 0797US12329462B2Systems and methods for processing electronic images to assess end-organ demandHEARTFLOW INC·Filed 2023·Granted Jun 17, 2025·5 cites·20 claims
- 0897US12096990B2Systems and methods for estimation of blood flow using response surface and reduced order modelingHEARTFLOW INC·Filed 2023·Granted Sep 24, 2024·13 cites·20 claims
- 0997US12004841B2Systems and methods for estimation of blood flow characteristics using reduced order model and/or machine learningHEARTFLOW INC·Filed 2023·Granted Jun 11, 2024·17 cites·20 claims
- 1097US11653833B2System and methods for estimation of blood flow characteristics using reduced order model and machine learningHEARTFLOW INC·Filed 2021·Granted May 23, 2023·42 cites·20 claims
- 1197US10945606B2System and methods for estimation of blood flow characteristics using reduced order model and machine learningHEARTFLOW INC·Filed 2017·Granted Mar 16, 2021·69 cites·18 claims
- 1297US8068802B2Estimating the location of a wireless terminal based on calibrated signal-strength measurementsBHATTACHARYA TARUN KUMAR·Filed 2010·Granted Nov 29, 2011·56 cites·34 claims
- 1397US7433695B2Computationally-efficient estimation of the location of a wireless terminal based on pattern matchingPOLARIS WIRELESS INC·Filed 2006·Granted Oct 7, 2008·77 cites·9 claims
- 1496US12295700B2Systems and methods for estimation of blood flow characteristics using reduced order model and/or machine learningHEARTFLOW INC·Filed 2024·Granted May 13, 2025·5 cites·20 claims
- 1596US10973583B2System and method for diagnosis and assessment of cardiovascular disease by comparing arterial supply capacity to end-organ demandHEARTFLOW INC·Filed 2019·Granted Apr 13, 2021·64 cites·17 claims
- 1696US8068855B2Location determination using RF fingerprintingDRESSLER ROBERT MORRIS·Filed 2010·Granted Nov 29, 2011·48 cites·12 claims
- 1796US7796966B2Estimating the location of a wireless terminal based on calibrated signal-strength measurementsPOLARIS WIRELESS INC·Filed 2005·Granted Sep 14, 2010·62 cites·20 claims
- 1896US6782265B2Location determination using RF fingerprintingPOLARIS WIRELESS INC·Filed 2002·Granted Aug 24, 2004·129 cites·10 claims
- 1995US7899467B2Estimating the location of a wireless terminal based on the traits of the multipath components of a signalPOLARIS WIRELESS INC·Filed 2006·Granted Mar 1, 2011·60 cites·6 claims
- 2095US7734298B2Estimating the location of a wireless terminal based on signal path impairmentPOLARIS WIRELESS INC·Filed 2006·Granted Jun 8, 2010·59 cites·3 claims
- 2195US7383051B2Estimating the location of a mobile unit based on the elimination of improbable locationsPOLARIS WIRELESS INC·Filed 2005·Granted Jun 3, 2008·68 cites·9 claims
- 2294US9173064B1Estimating proximity to a mobile station by manipulating an interfering signalPOLARIS WIRELESS INC·Filed 2014·Granted Oct 27, 2015·13 cites·22 claims
- 2394US8155394B2Wireless location and facial/speaker recognition systemALLEGRA MANLIO·Filed 2011·Granted Apr 10, 2012·66 cites·20 claims
- 2494US7848762B2Computationally-efficient estimation of the location of a wireless terminal based on pattern matchingPOLARIS WIRELESS INC·Filed 2008·Granted Dec 7, 2010·48 cites·8 claims
- 2594US7167714B2Location determination using RF fingerprintsPOLARIS WIRELESS INC·Filed 2004·Granted Jan 23, 2007·73 cites·9 claims
- 2693US7753278B2Estimating the location of a wireless terminal based on non-uniform locationsPOLARIS WIRELESS INC·Filed 2006·Granted Jul 13, 2010·49 cites·22 claims
- 2793US7257414B2Estimating the Location of a Wireless Terminal Based on Non-Uniform Probabilities of MovementPOLARIS WIRELESS INC·Filed 2006·Granted Aug 14, 2007·52 cites·23 claims
- 2892US7233799B2Location estimation of wireless terminals based on combinations of signal strength measurements and geometry-of-arrival measurementsPOLARIS WIRELESS INC·Filed 2004·Granted Jun 19, 2007·73 cites·4 claims
- 2991US7725111B2Location determination using RF fingerprintingPOLARIS WIRELESS INC·Filed 2004·Granted May 25, 2010·65 cites·7 claims
- 3090US6944465B2Estimating the location of a mobile unit based on the elimination of improbable locationsPOLARIS WIRELESS INC·Filed 2002·Granted Sep 13, 2005·78 cites·15 claims
- 3190US6784826B2Body motion tracking systemTERA RES INC·Filed 2001·Granted Aug 31, 2004·155 cites·27 claims
- 3289US7116987B2Location estimation of wireless terminals through pattern matching of deduced and empirical signal-strength measurementsPOLARIS WIRELESS INC·Filed 2004·Granted Oct 3, 2006·77 cites·19 claims
- 3387US9220080B1Determining a propagation-time adjustment for a wireless coverage area, based on information provided by wireless terminalsPOLARIS WIRELESS INC·Filed 2015·Granted Dec 22, 2015·4 cites·22 claims
- 3487US7460505B2Location estimation of wireless terminals through pattern matching of signal-strength differentialsPOLARIS WIRELESS INC·Filed 2003·Granted Dec 2, 2008·59 cites·16 claims
- 3585US8838137B2Estimating the location of a wireless terminal in wireless telecommunications systems that comprise distributed and/or repeater antennasBHATTACHARYA TARUN KUMAR·Filed 2012·Granted Sep 16, 2014·6 cites·34 claims
- 3684US9414350B1Determining a propagation-time adjustment for a wireless coverage area, based on information provided by wireless terminalsPOLARIS WIRELESS INC·Filed 2015·Granted Aug 9, 2016·3 cites·20 claims
- 3784US2025387166A1Systems and methods for processing electronic images to assess end-organ demandHEARTFLOW INC·Filed 2025·Application pending·0 cites
- 3883US2024407849A1Systems and methods for estimation of blood flow using response surface and reduced order modelingHEARTFLOW INC·Filed 2024·Application pending·0 cites
- 3982US10517678B2System and method for diagnosis and assessment of cardiovascular disease by comparing arterial supply capacity to end-organ demandHEARTFLOW INC·Filed 2016·Granted Dec 31, 2019·3 cites·16 claims
- 4082US2025359757A1Systems and methods for estimation of blood flow characteristics using reduced order model and/or machine learningHEARTFLOW INC·Filed 2025·Application pending·0 cites
- 4180US9479902B1Determining a propagation-time adjustment for a wireless coverage area, based on information provided by wireless terminalsPOLARIS WIRELESS INC·Filed 2016·Granted Oct 25, 2016·2 cites·20 claims
- 4280US9473896B1Estimating proximity to a mobile station by manipulating an interfering signalPOLARIS WIRELESS INC·Filed 2016·Granted Oct 18, 2016·2 cites·20 claims
- 4377US9402157B1Estimating proximity to a mobile station by manipulating a signal that is decodable, but unexpected in the wireless network serving the mobile stationPOLARIS WIRELESS INC·Filed 2014·Granted Jul 26, 2016·6 cites·20 claims
- 4477US9164162B1Estimating information about an antenna system, based on propagation-time measurements that are provided by wireless terminalsPOLARIS WIRELESS INC·Filed 2015·Granted Oct 20, 2015·2 cites·21 claims
- 4576US9301273B1Base station timing derived from wireless terminal informationPOLARIS WIRELESS INC·Filed 2015·Granted Mar 29, 2016·2 cites·30 claims
- 4666US9408030B1Estimating proximity to a mobile station by manipulating an interfering signalPOLARIS WIRELESS INC·Filed 2015·Granted Aug 2, 2016·1 cites·20 claims
- 4756US9844019B1Estimating the location of a wireless terminal in wireless telecommunications systems that comprise distributed and/or repeater antennasPOLARIS WIRELESS INC·Filed 2014·Granted Dec 12, 2017·0 cites·32 claims
- 4854US9408173B1Base station timing derived from wireless terminal informationPOLARIS WIRELESS INC·Filed 2016·Granted Aug 2, 2016·0 cites·24 claims
- 4951US9374801B1Estimating information about an antenna system, based on propagation-time measurements that are provided by wireless terminalsPOLARIS WIRELESS INC·Filed 2015·Granted Jun 21, 2016·0 cites·20 claims
- 5051US9088943B1Base station timing derived from wireless terminal informationPOLARIS WIRELESS INC·Filed 2013·Granted Jul 21, 2015·0 cites·50 claims
Showing the top 50 of 60 patent records by PatentIndex Score.
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