Learn more

HANDAN SPECIAL SHAFT SINKING CO LTD CHINA COAL ENERGY GROUP CO LTD

Overview
  • Total Patents
    13
  • GoodIP Patent Rank
    177,754
  • Filing trend
    ⇩ 100.0%
About

HANDAN SPECIAL SHAFT SINKING CO LTD CHINA COAL ENERGY GROUP CO LTD has a total of 13 patent applications. It decreased the IP activity by 100.0%. Its first patent ever was published in 2011. It filed its patents most often in China. Its main competitors in its focus markets civil engineering are DELFOS & ATLAS COPCO, STEIN NARVESTAD AS and RME UNDERGROUND PTY LTD.

Patent filings in countries

World map showing HANDAN SPECIAL SHAFT SINKING CO LTD CHINA COAL ENERGY GROUP CO LTDs patent filings in countries
# Country Total Patents
#1 China 13

Patent filings per year

Chart showing HANDAN SPECIAL SHAFT SINKING CO LTD CHINA COAL ENERGY GROUP CO LTDs patent filings per year from 1900 to 2020

Focus industries

# Industry
#1 Civil engineering

Focus technologies

# Technology
#1 Earth drilling
#2 Shafts

Top inventors

# Name Total Patents
#1 Zhao Zhifu 6
#2 Guo Yongfu 5
#3 Li Ruizhi 4
#4 Shi Yongchao 3
#5 Zhang Shuhong 2
#6 Wang Yingbo 2
#7 Guo Peng 2
#8 Li Shengli 2
#9 Zhang Ligang 2
#10 Yang Yanbin 2

Latest patents

Publication Filing date Title
CN107387089A Prevent water freezing device in inclined shaft freezing osculum
CN105756565A Well digging drill bit
CN104806186A Buried drill punching tool
CN104808247A Detection method of freezing effect
CN104790957A Liquid nitrogen freezing device
CN104314487A Single-section drill rod fixing frame
CN103924926A Fast drilling construction method of superficial gravel stratum
CN103924979A Frozen liquid supply pipe pulling device
CN103692465A Plastic pipe cutter
CN103321239A Drilling machine foundation
CN102903196A Burglar alarm for cable
CN102699150A Bending straightener for drill pipe
CN102230379A Saline flow detection device of freezer