LexDanaLexDanabeta
Inventor

ChunYan Yu

Inventor
Hangzhou, CN

Overview

2→
Patents
2019–2020
Patent span
Performing operations
Primary field (CPC B)

Patents· 2 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

B66Bprimary
B66BElevators67%
B24BMachines, devices, or processes for grinding or polishing33%
PatentTitleYear
10,618,778Openable extensible panel and elevator ceiling, car and system with the same202010,246,297Rust removing device for elevator guide rail2019

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

2019–2020Patents assigned to OTIS ELEVATOR CO (2)· patent assignee history
2019–2020Based in Hangzhou, CN· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
OTIS ELEVATOR CO22019–2020
Locations
LocationPatentsSpan
Hangzhou, CN22019–2020