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LIANG WEICHENG

Overview
  • Total Patents
    21
  • GoodIP Patent Rank
    111,352
About

LIANG WEICHENG has a total of 21 patent applications. Its first patent ever was published in 2009. It filed its patents most often in China. Its main competitors in its focus markets civil engineering are KEYSTONE AIR & DRILL SUPPLY CO, TYRFING INNOVATION AS and HPI AS.

Patent filings in countries

World map showing LIANG WEICHENGs patent filings in countries
# Country Total Patents
#1 China 21

Patent filings per year

Chart showing LIANG WEICHENGs patent filings per year from 1900 to 2020

Focus industries

# Industry
#1 Civil engineering

Focus technologies

# Technology
#1 Earth drilling

Top inventors

# Name Total Patents
#1 Liang Weicheng 21
#2 Liang Chuang 17
#3 Wang Anping 2
#4 Liu Bao 2
#5 Pan Xiaochun 1
#6 Wang Xiangli 1
#7 Liu Yasan 1

Latest patents

Publication Filing date Title
CN105604520A Packer with function of pressure relief protection
CN105672954A Controllable annular sand preventer
CN105672931A Novel hydraulic blowout prevention automatic controller
CN105422037A Hydraulic automatic blowout control controller
CN105696964A Blowout prevention protection packer
CN105239952A Blowout prevention tool for water injection well
CN105134121A Screw pump blowout prevention supporting slips anchoring tool
CN104863522A Oil well pump wandering-type anti-deviation grinding device
CN104563963A Thermal well-flushing fluid director
CN104564669A Screw pump disconnecting device
CN104481461A Oil-pumping operation system of small-diameter pump
CN104481459A Oil pumping system for screw pump
CN104481460A Large pump oil pumping system
CN103953294A Pipe string falling anti-down-impact device
CN102996095A Well washing type step-by-step deblocking expanding long rubber barrel packer
CN102337854A Washable well type gradual unpacking packer
CN102146912A High-strength large-pump tripping device
CN102071899A Gradually unpacked washable well packer
CN101709631A Blowout-prevention connecting-tripping device
CN101793128A Blowout preventing tubing anchor