Junfeng Guan has been granted 4 US patents while listed as an inventor at Abb Power Electronics. The first was granted in 2023 and the most recent in June 2025. Junfeng Guan ranks #1,080,739 of 4,157,543 US inventors in our database (top 26.0%). Patent records list Junfeng Guan in Champaign, IL, US.