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CHANGSHA HEIJINGANG IND CO LTD

Overview
  • Total Patents
    34
  • GoodIP Patent Rank
    50,257
  • Filing trend
    ⇧ 150.0%
About

CHANGSHA HEIJINGANG IND CO LTD has a total of 34 patent applications. It increased the IP activity by 150.0%. Its first patent ever was published in 2008. It filed its patents most often in China. Its main competitors in its focus markets civil engineering, materials and metallurgy and measurement are CHANGSHA TIANHE DRILLING TOOLS AND MACHINERY CO LTD, VAREL INT IND LP and INNOVEX DOWNHOLE SOLUTIONS INC.

Patent filings in countries

World map showing CHANGSHA HEIJINGANG IND CO LTDs patent filings in countries
# Country Total Patents
#1 China 34

Patent filings per year

Chart showing CHANGSHA HEIJINGANG IND CO LTDs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Yang Riping 33
#2 Yang Xianglong 31
#3 Chen Zhen 8
#4 Zhu Zijia 7
#5 Wei Zhengjun 7
#6 Ma Shidong 4
#7 Zhao Yingjiu 3
#8 Xiang Renfa 2
#9 Yang Jun 2
#10 He Desheng 2

Latest patents

Publication Filing date Title
CN112282637A Large-diameter combined impactor and down-the-hole drill
CN112251711A Carburized workpiece and preparation method thereof
CN111927327A Tooth pressing device for eccentric sleeve of pipe following drilling tool
CN111922752A Major diameter drilling tool tooth's socket processingequipment
CN111877989A Hole expanding drilling tool with sliding block
CN111395951A Heavy-calibre reverse circulation impact system
CN111425146A Composite welding layer sleeve for rock drilling and preparation method thereof
CN110984868A Centering rotor is with pipe drilling tool
CN110984867A Continuous pipe-following drilling system and non-stop three-groove concentric pipe-following drilling tool
CN111075356A Continuous pipe-following drilling system and non-stop two-groove concentric pipe-following drilling tool
CN110847808A Impacter with quick change structure
CN110939380A Impactor
CN110952918A Impactor
CN111058772A Eccentric drilling tool
CN110952917A Combined rotary down-the-hole impacting device
CN111075348A Combined rotary impactor
CN111305749A Combined rotary down-the-hole drill
CN110905416A Drill bit for combined rotary impactor
CN110952919A Mounting seat for combined type rotary impactor
CN110847805A Impactor