Inventor
Dodson Graydon Randall
US7 patents
Patents
7 patentsUS9876794B2Jan 23, 2018
Systems and methods for authentication of printer supply items
LEXMARK INT INC36 citations90
US9665748B1May 30, 2017
Magnetic helical physical unclonable function measured adjacent to flight
LEXMARK INT INC13 citations83
US9542576B1Jan 10, 2017
Magnetic helical physical unclonable function measured above flight
LEXMARK INT INC19 citations82
US9959493B2May 1, 2018
Systems and methods for authentication of printer supply items
LEXMARK INT INC5 citations68
US10877398B2Dec 29, 2020
Toner cartridge for image forming device including flight with magnetic particles to generate a magnetic field
LEXMARK INT INC0 citations51
US10102466B2Oct 16, 2018
Magnetic keys having a plurality of magnet layers with holes
LEXMARK INT INC0 citations51
US10212300B2Feb 19, 2019
Magnetic keys having a plurality of magnetic plates
LEXMARK INT INC0 citations41