Xiaofei Guo has been granted 22 US patents while listed as an inventor at Otis Elevator. The first was granted in 2018 and the most recent in September 2025. Xiaofei Guo ranks #189,202 of 4,157,543 US inventors in our database (top 4.6%). Patent records list Xiaofei Guo in Sunnyvale, CA, US.