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Inventor

Haijiang Zhang

Inventor
Beijing, CN

Overview

2→
Patents
2005–2021
Patent span
Fixed constructions
Primary field (CPC E)

Patents· 2 as inventor

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

E21Bprimary
E21BEarth or rock drilling20%
E21CMining or quarrying20%
E21DShafts20%
E21FSafety devices, transport, filling-up, rescue, ventilation, or draining in or of mines or tunnels20%
H10WGeneric packages, interconnections, connectors or other constructional details of devices covered by class h1020%
PatentTitleYear
11,008,860Equipment system for no-roadway no-coal-pillar retained roadway mining method20216,873,527'Heat transfer apparatus'2005

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

2005Based in Singapore, SG· patent location history
2021Patents assigned to HE MANCHAO (1)· patent assignee history
2021Patents assigned to MANCHAO HE (1)· patent assignee history
2021Based in Beijing, CN· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
HE MANCHAO12021
MANCHAO HE12021
Locations
LocationPatentsSpan
Beijing, CN12021
Singapore, SG12005