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NO 4 ENG CO LTD OF CHINA RAILWAY NO 9 GROUP CO LTD

Overview
  • Total Patents
    19
  • GoodIP Patent Rank
    87,280
  • Filing trend
    ⇧ 250.0%
About

NO 4 ENG CO LTD OF CHINA RAILWAY NO 9 GROUP CO LTD has a total of 19 patent applications. It increased the IP activity by 250.0%. Its first patent ever was published in 2017. It filed its patents most often in China. Its main competitors in its focus markets civil engineering, measurement and agriculture are CHINA RAILWAY NO 10 ENG GROUP CO LTD, SHANGHAI TUNNEL ENG CO LTD and China railway tunnel group co ltd.

Patent filings in countries

World map showing NO 4 ENG CO LTD OF CHINA RAILWAY NO 9 GROUP CO LTDs patent filings in countries
# Country Total Patents
#1 China 19

Patent filings per year

Chart showing NO 4 ENG CO LTD OF CHINA RAILWAY NO 9 GROUP CO LTDs patent filings per year from 1900 to 2020

Focus industries

Top inventors

# Name Total Patents
#1 Yan Shishun 9
#2 Li Hui 9
#3 Yang Liuzhi 8
#4 Wang Huaidong 7
#5 Wang Ying 7
#6 Liu Fenglin 6
#7 Xu Lize 5
#8 Li Runwei 4
#9 Han Chao 4
#10 Han Jiapeng 4

Latest patents

Publication Filing date Title
CN111929347A Shield tunneling machine construction boulder detection device and detection method
CN111852168A Large-scale standing tower inverted installation device and inverted construction method
CN111927474A Split transverse moving method and split transverse moving device of shield tunneling machine
CN111809875A Device and method for constructing inner wall by adopting polymer template reverse construction method
CN110725706A Tunnel water burst water stop method
CN111058864A Tunnel vault lining rear cavity high-pressure grouting auxiliary device
CN110847156A Steel reinforcement cage suitable for underground diaphragm wall of air shaft and use method
CN110821503A Construction method for main body of ultra-deep shield section air shaft after tunnel advance
CN110631918A Tunnel invasion contact strip long pipe shed reinforcement stability judgment method
CN110685697A Freezing construction method and freezing system for connection channel
CN108978645A Rich water sandy gravel shallow embedding riverbed uplift pile anti-floating plate reinforced construction method is worn under shield
CN108755831A A kind of electric bucket tooth based on technology of Internet of things falls off real-time monitoring alarming method and warning device
CN109030043A A kind of shield machine cutter failure real-time detection alarming method and device based on technology of Internet of things
CN109000551A It is embedded in the synchronous abrasion distance measuring sensor of resistance-type and its application
CN108716897A A kind of shield machine cutter abrasion quantitative detecting method and detection device based on technology of Internet of things
CN108868796A For wearing skyscraper group construction method under the shield sharp radius curve and heavy grade under water-rich sand layer
CN108825250A Vertical curve variable slope segment shield secant method originates construction
CN107246270A The small space of shield machine rapidly station-crossing construction method
CN107041278A The method that tall and big rare tree species are transplanted with " light rail " method