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CHINA RAILWAY 21ST BUREAU GROUP CO LTD

Overview
  • Total Patents
    50
  • GoodIP Patent Rank
    168,221
  • Filing trend
    0.0%
About

CHINA RAILWAY 21ST BUREAU GROUP CO LTD has a total of 50 patent applications. It increased the IP activity by 0.0%. 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 and environmental technology are BALTENSPERGER RUDOLF, HAYASHI SOJI KK and HEITKAMP GMBH BAU.

Patent filings in countries

World map showing CHINA RAILWAY 21ST BUREAU GROUP CO LTDs patent filings in countries
# Country Total Patents
#1 China 50

Patent filings per year

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

Focus industries

Top inventors

# Name Total Patents
#1 Tang Shulin 14
#2 Wei Cunlan 7
#3 Zhao Yanxu 7
#4 Shulin Tang 5
#5 Xue Ji An 4
#6 Li Wenbo 4
#7 Ma Jianhui 4
#8 Niu Shuqiang 3
#9 Huang Zhijun 3
#10 Zhu Changyue 3

Latest patents

Publication Filing date Title
CN108842541A The long rail of Ballast track draws method laying construction method and Ballast track construction method
CN107609741A A kind of tunnel working geology disaster alarm method and system
CN106284094A A kind of bridge construction concrete adhesion type prestressed girder support
CN105421161A Embankment structure capable of preventing loess embankment from wetting deformation
CN105155849A Regular automatic maintenance and sprinkling facility for concrete
CN105002818A Frame type bridge and road transition section structure connected with bridge abutment into whole
CN105040575A Pile truss combined type bridge-road transition section structure independent of bridge abutment
CN105648911A Concrete attached type prestress truss support for cast-in-place beam, cover beam and straining beam in bridge construction
CN104164837A Automatic-locating continuous pushing device for large box beams
CN104265305A Enlarging and excavating method for merging two small-cross-section caverns into one large-cross-section cavern
CN103422865A Tunnel excavation plastic cutter and tunnel arc-shaped excavation method for weak surrounding rock section
CN103410062A Method for constructing monolithic roadbed by using single railway tunnel bracket type steel rail way
CN103422873A Strong-strength extendable anchor rod
CN103346568A Low voltage compensation method for construction in extra-long tunnel
CN103031862A Three-dimensional digital prewarning method and facility for remote intelligent monitoring of deep foundation pit deformation stability
CN103046526A Method and system for remote intelligent monitoring and three-dimensional digital early warning of deep foundation pit bottom surface upheavals
CN103061322A Method and system for remote intelligent monitoring and three-dimensional digital comprehensive warning of deep foundation pit stability
CN103046525A Facility and method for mechanical stability remote intelligent monitoring and three-dimensional early warning of deep foundation pit
CN103077585A Remote three-dimensional digital safe early warning method and system for comprehensive stability of high slope
CN103021137A Surface displacement method high slope stability remote three-dimensional digital warning method and system