DJ

David Stevenson Spain, Jr.

PW Polaris Wireless: 39 patents #2 of 51Top 4%
HE Heartflow: 13 patents #14 of 49Top 30%
📍 Portland, OR: #311 of 9,213 inventorsTop 4%
🗺 Oregon: #623 of 28,073 inventorsTop 3%
Overall (All Time): #48,557 of 4,157,543Top 2%
53
Patents All Time

Issued Patents All Time

Showing 26–50 of 53 patents

Patent #TitleCo-InventorsDate
9164162 Estimating information about an antenna system, based on propagation-time measurements that are provided by wireless terminals Robert Lewis Martin 2015-10-20
9088943 Base station timing derived from wireless terminal information Scot Douglas Gordon 2015-07-21
8838137 Estimating the location of a wireless terminal in wireless telecommunications systems that comprise distributed and/or repeater antennas Tarun Kumar Bhattacharya, Hassan Mohamed El-Sallabi, Robert Lewis Martin 2014-09-16
8712428 Location estimation of wireless terminals through pattern matching of deduced signal strengths 2014-04-29
8583141 Estimating the location of a wireless terminal based on signal path impairment Tarun Kumar Bhattacharya, Martin Feuerstein, Scot Douglas Gordon 2013-11-12
8571577 Estimating the location of a wireless terminal based on signal path impairment Tarun Kumar Bhattacharya, Martin Feuerstein, Scot Douglas Gordon 2013-10-29
8565786 Estimating the location of a wireless terminal based on signal path impairment Tarun Kumar Bhattacharya, Martin Feuerstein, Scot Douglas Gordon 2013-10-22
8406166 Location estimation of wireless terminals through pattern matching of signal-strength differentials 2013-03-26
8155394 Wireless location and facial/speaker recognition system Manlio Allegra, Martin Feuerstein, Mahesh B. Patel 2012-04-10
8068802 Estimating the location of a wireless terminal based on calibrated signal-strength measurements Tarun Kumar Bhattacharya, Martin Feuerstein 2011-11-29
8068855 Location determination using RF fingerprinting Robert Morris Dressler 2011-11-29
7899467 Estimating the location of a wireless terminal based on the traits of the multipath components of a signal Martin Feuerstein, Scot Douglas Gordon 2011-03-01
7848762 Computationally-efficient estimation of the location of a wireless terminal based on pattern matching Scot Douglas Gordon, Robert Lewis Martin 2010-12-07
7796966 Estimating the location of a wireless terminal based on calibrated signal-strength measurements Tarun Kumar Bhattacharya, Martin Feuerstein 2010-09-14
7753278 Estimating the location of a wireless terminal based on non-uniform locations Martin Feuerstein, Robert Morris Dressler 2010-07-13
7734298 Estimating the location of a wireless terminal based on signal path impairment Tarun Kumar Bhattacharya, Martin Feuerstein, Scot Douglas Gordon 2010-06-08
7725111 Location determination using RF fingerprinting Robert Morris Dressler 2010-05-25
7460505 Location estimation of wireless terminals through pattern matching of signal-strength differentials 2008-12-02
7433695 Computationally-efficient estimation of the location of a wireless terminal based on pattern matching Scot Douglas Gordon, Robert Lewis Martin 2008-10-07
7383051 Estimating the location of a mobile unit based on the elimination of improbable locations Robert Lewis Martin, Luis Perez-Breva 2008-06-03
7257414 Estimating the Location of a Wireless Terminal Based on Non-Uniform Probabilities of Movement Robert Morris Dressler 2007-08-14
7233799 Location estimation of wireless terminals based on combinations of signal strength measurements and geometry-of-arrival measurements 2007-06-19
7167714 Location determination using RF fingerprints Robert Morris Dressler 2007-01-23
7116987 Location estimation of wireless terminals through pattern matching of deduced and empirical signal-strength measurements Robert Lewis Martin, Tarun Kumar Bhattacharya 2006-10-03
6944465 Estimating the location of a mobile unit based on the elimination of improbable locations Robert Lewis Martin, Luis Perez-Breva 2005-09-13