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THE 4TH ENG CO LTD OF CHINA RAILWAY 18TH BUREAU GROUP CO LTD

Overview
  • Total Patents
    23
  • GoodIP Patent Rank
    70,008
About

THE 4TH ENG CO LTD OF CHINA RAILWAY 18TH BUREAU GROUP CO LTD has a total of 23 patent applications. Its first patent ever was published in 2014. It filed its patents most often in China. Its main competitors in its focus markets civil engineering, machines and measurement are SHANDONG TAGAO MINING EQUIPMENT MFG CO LTD, BEIJING COAL MINING MACH CO and CHINA RAILWAY 21ST BUREAU GROUP THE 3RD ENG CO LTD.

Patent filings in countries

World map showing THE 4TH ENG CO LTD OF CHINA RAILWAY 18TH BUREAU GROUP CO LTDs patent filings in countries
# Country Total Patents
#1 China 23

Patent filings per year

Chart showing THE 4TH ENG CO LTD OF CHINA RAILWAY 18TH BUREAU GROUP CO LTDs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Zhang Chenglong 8
#2 Zhang Xin 6
#3 Liu Zitian 6
#4 Wang Xiaodan 5
#5 Chen Taotao 4
#6 Zhang Pengzhong 4
#7 Shi Xiufeng 4
#8 Wu Limin 4
#9 Li Jinsuo 4
#10 Zhong Xingbing 4

Latest patents

Publication Filing date Title
CN110619140A Accurate and rapid adjusting method for prefabricated section beam template
CN110206550A A kind of complicated geological excavates the construction of shield received well
CN110552717A sand cobble stratum shield tunnel earth surface layering differential settlement space grouting settlement reduction method
CN110552705A Automatic improvement method for residual soil during tunneling of earth pressure balance shield tunnel
CN110184924A A kind of U case combination continuous beam subsection cast-in-situ activity adjustment gang form
CN110102671A A kind of artificial bar cutting device and its construction method
CN106761797A A kind of heavy grade curve shield driving vertical missing control and the method for correction
CN107060813A A kind of method of sharp radius curve shield duct piece type selecting
CN108115842A The method heated using residual heat from boiler fume to concrete mixing station river sand feed bin
CN108115841A Concrete mixing station aggregate heating means
CN108119145A Freeze the lining bracket panel of deep shaft two and carry turnover-proof device
CN108118842A Concrete mixing station roof insulating ceiling snow-removing method
CN108115843A Concrete mixing station heating water tanks method
CN108128607A A kind of umbrella bores shift system
CN106180981A The CO of super large caliber steel pipe2gas protection welding process
CN106066177A Shield automatic guiding system measures manual review's method
CN105971613A Hob arranging method for hard rock stratum shield tunneling cutterhead
CN106703817A Construction method for reducing damaged segments and offset deformation by small-radius curved shield tunneling
CN106677793A Heading machine head for jacking soil cutting and deviation adjusting of culvert pipe with large diameter
CN106567345A Jacking construction method for shallow-buried long-span oblique-crossing frame-shaped culvert of existing railway