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CHINA RAILWAY 11TH BUREAU GROUP NO 4 ENG CO LTD

Overview
  • Total Patents
    51
  • GoodIP Patent Rank
    29,079
  • Filing trend
    ⇩ 83.0%
About

CHINA RAILWAY 11TH BUREAU GROUP NO 4 ENG CO LTD has a total of 51 patent applications. It decreased the IP activity by 83.0%. Its first patent ever was published in 2016. It filed its patents most often in China. Its main competitors in its focus markets civil engineering, it methods for management and measurement are VANWERSCH ALOYS, KOPALNIA WEGLA KAMIENNEGO SZOM and MACKINA WESTFALIA S A.

Patent filings in countries

World map showing CHINA RAILWAY 11TH BUREAU GROUP NO 4 ENG CO LTDs patent filings in countries
# Country Total Patents
#1 China 51

Patent filings per year

Chart showing CHINA RAILWAY 11TH BUREAU GROUP NO 4 ENG CO LTDs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Wang Gengfeng 16
#2 Jiao Xianfu 16
#3 Li Jun 14
#4 Liu Suyun 14
#5 Yuan Zhonghua 13
#6 Cao Guangwei 12
#7 Zhou Chaofeng 10
#8 Zhao Xiaojun 9
#9 Qin Lipeng 9
#10 Li Da 8

Latest patents

Publication Filing date Title
CN111734487A Two lining hole detecting instrument of crawler-type tunnel carry on and equip
CN111734486A Flat plate type tunnel secondary lining cavity detection instrument carrying equipment
CN111852560A System for controlling automatic driving of carrying equipment of tunnel secondary lining hole detection instrument
CN111650561A Clamp device of elastic radar detection antenna
CN111709650A Coastal complex stratum shield tunneling adaptability evaluation method
CN111709648A Shield type selection adaptability evaluation method for coastal complex stratum
CN111272090A Vault crown deformation alarm device and method for tunnel lower step excavation
CN110486046A A kind of tunnel inverted arch side wall concrete self-propelled pours device
CN110486068A A kind of tunnel advanced support formula lock foot anchoring stock structure and its construction method
CN110284919A A kind of cleaning of crawler type tunnel inverted arch and cleaner
CN110295559A A kind of cleaning of sectional type tunnel inverted arch and cleaner
CN110284920A A kind of flat tunnel inverted arch cleaning and cleaner
CN110159284A Strand hydraulic reclamation stratum shield machine is ultra-shallow earth-covered, big longitudinal slope originates construction method
CN109812281A A kind of tunnel double-lining concrete is automatically inserted into the construction method of formula tamping equipment
CN109707409A A kind of tunnel double-lining concrete vibrating system
CN109707408A A kind of soft lap device of tunnel double-lining end head formwork pressure visualization
CN109738033A A kind of tunnel double-lining concrete flow quantity monitoring device and its application method
CN109611123A Tunnel double-lining concreting control system and control method
CN109798129A A kind of tunnel double-lining concrete is automatically inserted into formula tamping equipment
CN109826649A Tunnel double-lining concrete casting system construction method