Regan E. Harmon has been granted 9 US patents while listed as an inventor at Mastercard. The first was granted in 2020 and the most recent in September 2025. Regan E. Harmon ranks #535,341 of 4,157,543 US inventors in our database (top 12.9%). Patent records list Regan E. Harmon in O'Fallon, MO, US.