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CHINA RAILWAY 21 BUREAU GROUP RAIL TRANSIT ENG CO LTD

Overview
  • Total Patents
    11
  • GoodIP Patent Rank
    156,842
  • Filing trend
    ⇧ 900.0%
About

CHINA RAILWAY 21 BUREAU GROUP RAIL TRANSIT ENG CO LTD has a total of 11 patent applications. It increased the IP activity by 900.0%. 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 and machines are GEBIRGSSICHERUNG GMBH, LAN CHUANWEN and HYUN ENG AND CONSTRUCTION CO LTD.

Patent filings in countries

World map showing CHINA RAILWAY 21 BUREAU GROUP RAIL TRANSIT ENG CO LTDs patent filings in countries
# Country Total Patents
#1 China 11

Patent filings per year

Chart showing CHINA RAILWAY 21 BUREAU GROUP RAIL TRANSIT ENG CO LTDs patent filings per year from 1900 to 2020

Focus industries

Focus technologies

Top inventors

# Name Total Patents
#1 Chen Deguo 10
#2 Tian Zuohua 5
#3 Zhu Bin 3
#4 Wang Weigang 3
#5 Jing Lian 3
#6 Yang Fengtian 2
#7 Wei Wenyi 2
#8 Cheng Zhenhong 2
#9 Wang Tianliang 2
#10 Li Shicai 2

Latest patents

Publication Filing date Title
CN109630173A A kind of prestress anchorage cable cleaning plant and method
CN109184750A A kind of tunnel radial grouting device and method
CN109291241A A kind of bentonite extruding storage device and application method
CN108915702A It is a kind of circle narrow-bore tunnel in shield method of reseptance
CN108915725A A kind of small template lining construction method in double -side approach tunnel
CN108678781A One kind closing on river shield launching end stratum consolidation method
CN108361039A A kind of horizontally-supported construction method of asymmetric twin-arch tunnel of " OC " shape
CN108166989A The asymmetric twin-arch tunnel interval wall construction method of water rich strata " OC " shape
CN108180025A A kind of circular cross section tunnel lining construction method three times
CN108361049A A kind of tunnel waterproofing construction construction method
CN107842021A A kind of interlocking pile and its construction method of sandy gravel Red Sandstone compound stratum