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Inventor

Yanfu Huang

Inventor
Beijing, CN

Overview

2→
Patents
2017–2020
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 drilling67%
F16LPipes33%
PatentTitleYear
10,808,496Cementing plug20209,816,327'Information transmission apparatus for logging while drilling'2017

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

2017–2020Patents assigned to CHINA NAT PETROLEUM CORP (2)· patent assignee history
2017Patents assigned to BEIJING PETROLEUM MACHINERY FACTORY (1)· patent assignee history
2017Patents assigned to CNPC DRILLING RES INST (1)· patent assignee history
2017–2020Based in Beijing, CN· patent location history
2020Patents assigned to BEIJING PETROLEUM MACHINERY CO (1)· patent assignee history
2020Patents assigned to CNPC ENG TECH RES & DEV CO LTD (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
CHINA NAT PETROLEUM CORP22017–2020
BEIJING PETROLEUM MACHINERY CO12020
BEIJING PETROLEUM MACHINERY FACTORY12017
CNPC DRILLING RES INST12017
CNPC ENG TECH RES & DEV CO LTD12020
Locations
LocationPatentsSpan
Beijing, CN22017–2020