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Inventor

Kechu Han

Inventor
Binzhou, CN

Overview

1→
Patents
2017
Patent span
Fixed constructions
Primary field (CPC E)

Patents· 1 as inventor

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

E21Bprimary
E21BEarth or rock drilling100%
PatentTitleYear
9,850,744Method for extracting coalbed gas through water and coal dust drainage and a device thereof2017

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

2017Patents assigned to SHENGLI LONGDI PETROLEUM TECH & EQUIPMENT CO LTD (1)· patent assignee history
2017Patents assigned to SHENGLI LONGDI PETROLEUM TECH & EQUPIMENT CO LTD (1)· patent assignee history
2017Based in Binzhou, CN· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
SHENGLI LONGDI PETROLEUM TECH & EQUIPMENT CO LTD12017
SHENGLI LONGDI PETROLEUM TECH & EQUPIMENT CO LTD12017
Locations
LocationPatentsSpan
Binzhou, CN12017