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Inventor

Li Zhu

Inventor
Jiangsu, CN

Overview

2→
Patents
2004–2021
Patent span
Human necessities
Primary field (CPC A)

Patents· 2 as inventor

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

A47Cprimary
A47CChairs33%
A61GTransport, personal conveyances, or accommodation specially adapted for patients or disabled persons33%
B01JChemical or physical processes, e.g. catalysis or colloid chemistry33%
PatentTitleYear
11,109,681Self-locking mechanism and lift chair therewith20216,673,741'Guard catalyst and a process for its preparation'2004

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

2004Patents assigned to CHINA PETROLEUM & CHEMICAL (1)· patent assignee history
2004Patents assigned to RES INST PETROLEUM PROCESSING (1)· patent assignee history
2004Based in Beijing, CN· patent location history
2021Patents assigned to CHANGZHOU ZEHUI MACHINERY CO LTD (1)· patent assignee history
2021Based in Jiangsu, CN· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
CHANGZHOU ZEHUI MACHINERY CO LTD12021
CHINA PETROLEUM & CHEMICAL12004
RES INST PETROLEUM PROCESSING12004
Locations
LocationPatentsSpan
Jiangsu, CN12021
Beijing, CN12004