QingXi Cai has been granted 6 US patents while listed as an inventor at Otis Elevator . The first was granted in 2018 and the most recent in August 2024. QingXi Cai ranks #779,687 of 4,157,543 US inventors in our database (top 18.8%). Patent records list QingXi Cai in Hangzhou City, CN.
Patents per Year Patents granted per year, 2018 to 2024 Bar chart with a peak of 2 patents in 2019. peak 2 2018: 1 patents 2018 2019: 2 patents 2019 2020: 1 patents 2020 2023: 1 patents 2023 2024: 1 patents 2024
Issued Patents All Time
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Showing 1–6 of 6 patents
Patent # Title Co-Inventors Date
D1039409 Escalator smart traffic flow lighting device Lilong Shi , Shunqiang Zhou , Sihua Ling , Denghui Zhang 2024-08-20
11831165 Hierarchical control method for island power grid energy storage system for increasing new energy generation fluctuation Jian Yang , Jianhua Lv , Guode Ying , Zuofu Jiang , Xin Wang +16 more 2023-11-28
10865074 Handrail automatically tensioning system and a method for adjusting tension level of handrail Jianguo Li , Xin Wei , Jie Hu , Lifei Cheng , ZuAn Tang +1 more 2020-12-15
10427914 Elevator synchronous door knife Xiaobo ZHANG , XiaoXiao Dong , Chong Chen 2019-10-01
10189680 Landing-door door lock device Yongtao Yang , Huanfeng Liu , Chong Chen , Hua Zhang , Junfeng Wu 2019-01-29
10040669 Asynchronous door knife of elevator integrated car door lock Xiaobo ZHANG , XiaoXiao Dong , Minchao Chen , Senyuan Qiao 2018-08-07