Inventor
ELSON JOHN TODD
US19 patents
⚠️ This page may combine multiple inventors who share the name “ELSON JOHN TODD”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
AMTECH SYSTEMS LLC
13 patentsUS10134210B1Nov 20, 2018
Vehicle tracking system using smart-phone as active transponder
AMTECH SYSTEMS LLC14 citations91
US11039284B1Jun 15, 2021
Vehicle tracking system using smart-phone as active transponder
AMTECH SYSTEMS LLC1 citations72
US10708745B2Jul 7, 2020
Vehicle tracking system using smart-phone as active transponder
AMTECH SYSTEMS LLC3 citations72
US12505322B2Dec 23, 2025
Vehicle tracking system using smart-phone as active transponder
AMTECH SYSTEMS LLC0 citations62
US12483870B2Nov 25, 2025
Vehicle tracking system using smart-phone as active transponder
AMTECH SYSTEMS LLC0 citations62
US12015969B2Jun 18, 2024
Vehicle tracking system using smart-phone as active transponder
AMTECH SYSTEMS LLC0 citations62
US11836569B1Dec 5, 2023
Vehicle tracking system using smart-phone as active transponder
AMTECH SYSTEMS LLC0 citations62
US12069552B2Aug 20, 2024
Vehicle tracking system using smart-phone as active transponder
AMTECH SYSTEMS LLC0 citations61
US11323865B2May 3, 2022
Vehicle tracking system using smart-phone as active transponder
AMTECH SYSTEMS LLC0 citations61
US9316728B1Apr 19, 2016
System and method for estimating range to an RFID tag
AMTECH SYSTEMS LLC1 citations60
US9081088B1Jul 14, 2015
System and method for estimating range to an RFID tag
AMTECH SYSTEMS LLC3 citations60
US10302756B2May 28, 2019
System and method for estimating range to an RFID tag
AMTECH SYSTEMS LLC0 citations49
US9841500B2Dec 12, 2017
System and method for estimating range to an RFID tag
AMTECH SYSTEMS LLC0 citations49