Inventor
CAI QINGXI
CN10 patents
⚠️ This page may combine multiple inventors who share the name “CAI QINGXI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
OTIS ELEVATOR CO
9 patentsUSD1039409SAug 20, 2024
Escalator smart traffic flow lighting device
OTIS ELEVATOR CO4 citations82
US10189680B2Jan 29, 2019
Landing-door door lock device
OTIS ELEVATOR CO3 citations68
USD1096941SOct 7, 2025
Escalator smart traffic flow lighting device
OTIS ELEVATOR CO0 citations59
USD1096943SOct 7, 2025
Escalator smart traffic flow lighting device
OTIS ELEVATOR CO0 citations59
USD1096474SOct 7, 2025
Escalator smart traffic flow lighting device
OTIS ELEVATOR CO0 citations59
USD1096942SOct 7, 2025
Escalator smart traffic flow lighting device
OTIS ELEVATOR CO0 citations59
US10427914B2Oct 1, 2019
Elevator synchronous door knife
OTIS ELEVATOR CO1 citations59
US10865074B2Dec 15, 2020
Handrail automatically tensioning system and a method for adjusting tension level of handrail
OTIS ELEVATOR CO0 citations48
US10040669B2Aug 7, 2018
Asynchronous door knife of elevator integrated car door lock
OTIS ELEVATOR CO1 citations41