Inventor
SPITZER THOMAS N
US32 patents
⚠️ This page may combine multiple inventors who share the name “SPITZER THOMAS N”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
TYFONE INC
16 patentsUS7954716B2Jun 7, 2011
Electronic transaction card powered by mobile device
TYFONE INC317 citations99
US7954715B2Jun 7, 2011
Mobile device with transaction card in add-on slot
TYFONE INC95 citations99
US7954717B2Jun 7, 2011
Provisioning electronic transaction card in mobile device
TYFONE INC124 citations99
US7828214B2Nov 9, 2010
Mobile phone with electronic transaction card
TYFONE INC348 citations99
US7581678B2Sep 1, 2009
Electronic transaction card
TYFONE INC289 citations99
US7805615B2Sep 28, 2010
Asymmetric cryptography with user authentication
TYFONE INC84 citations98
US7364092B2Apr 29, 2008
Electronic stripe cards
TYFONE INC104 citations98
US9092708B1Jul 28, 2015
Wearable device with time-varying magnetic field
TYFONE INC15 citations96
US7991158B2Aug 2, 2011
Secure messaging
TYFONE INC89 citations95
US9715649B2Jul 25, 2017
Device with current carrying conductor to produce time-varying magnetic field
TYFONE INC9 citations93
US9202156B2Dec 1, 2015
Mobile device with time-varying magnetic field
TYFONE INC12 citations93
US10803370B2Oct 13, 2020
Provisioning wearable device with current carrying conductor to produce time-varying magnetic field
TYFONE INC4 citations84
US10185909B2Jan 22, 2019
Wearable device with current carrying conductor to produce time-varying magnetic field
TYFONE INC4 citations84
US9626611B2Apr 18, 2017
Provisioning mobile device with time-varying magnetic field
TYFONE INC0 citations63
US9251453B1Feb 2, 2016
Wearable device with time-varying magnetic field and single transaction account numbers
TYFONE INC0 citations63
US9208423B1Dec 8, 2015
Mobile device with time-varying magnetic field and single transaction account numbers
TYFONE INC0 citations63
NARENDRA SIVA G
11 patentsUS8091786B2Jan 10, 2012
Add-on card with smartcard circuitry powered by a mobile device
NARENDRA SIVA G87 citations99
US8083145B2Dec 27, 2011
Provisioning an add-on apparatus with smartcard circuity for enabling transactions
NARENDRA SIVA G100 citations99
US8136732B2Mar 20, 2012
Electronic transaction card with contactless interface
NARENDRA SIVA G15 citations96
US8573494B2Nov 5, 2013
Apparatus for secure financial transactions
NARENDRA SIVA G8 citations93
US8408463B2Apr 2, 2013
Mobile device add-on apparatus for financial transactions
NARENDRA SIVA G6 citations93
US8403219B2Mar 26, 2013
Apparatus with smartcard circuitry powered by a mobile device
NARENDRA SIVA G2 citations74
US9741027B2Aug 22, 2017
Memory card based contactless devices
NARENDRA SIVA G4 citations73
US9004361B2Apr 14, 2015
Wearable device transaction system
NARENDRA SIVA G0 citations63
US8474718B2Jul 2, 2013
Method for provisioning an apparatus connected contactless to a mobile device
NARENDRA SIVA G0 citations63
US8189788B2May 29, 2012
Hybrid symmetric/asymmetric cryptography with user authentication
NARENDRA SIVA G3 citations63
US8477940B2Jul 2, 2013
Symmetric cryptography with user authentication
NARENDRA SIVA G1 citations52
ICASHE INC
4 patentsUS11436461B2Sep 6, 2022
Mobile phone with magnetic card emulation
ICASHE INC6 citations94
US11270174B2Mar 8, 2022
Mobile phone with magnetic card emulation
ICASHE INC5 citations92
US12524641B2Jan 13, 2026
Mobile device with time-varying magnetic field and single transaction account numbers
ICASHE INC0 citations73
US12223378B2Feb 11, 2025
Electronic transaction mechanism
ICASHE INC0 citations73