Learn more

CHINA RAILWAY 13TH BUREAU GROUP CO LTD

Overview
  • Total Patents
    28
About

CHINA RAILWAY 13TH BUREAU GROUP CO LTD has a total of 28 patent applications. Its first patent ever was published in 2008. It filed its patents most often in China. Its main competitors in its focus markets civil engineering and machine tools are NARVESTAD AS STEIN, FERO GROUP PTY LTD and NELSON YVES.

Patent filings in countries

World map showing CHINA RAILWAY 13TH BUREAU GROUP CO LTDs patent filings in countries
# Country Total Patents
#1 China 28

Patent filings per year

Chart showing CHINA RAILWAY 13TH BUREAU GROUP CO LTDs patent filings per year from 1900 to 2020

Focus industries

Top inventors

# Name Total Patents
#1 Qu Jiansheng 6
#2 Song Zhanping 6
#3 Donghui Mao 6
#4 Yongmu Chai 6
#5 Chunhua Zou 6
#6 Jianqiang Li 5
#7 Shengxiang Lei 5
#8 Shushan Liu 4
#9 Wang Feng 3
#10 Zhao Xupeng 3

Latest patents

Publication Filing date Title
CN103711495A Support-free and partial-segment-free shield launching method for subsurface excavated tunnel
CN103726664A Post-tensioning prestress hole cleaning and reeving device and method
CN104695983A Method for welding embedded steel bar welding joints of two end nodes in initial supporting arch
CN104695877A Large pipe shed construction method by using Luoyang shovel
CN103643973A CRD construction method tunnel waterproof construction method
CN103645296A Underground water detection method
CN103643964A Excavation leakage-prevention supporting method for water-less sandy-soil stratum tunnel
CN104088665A Steel pipe column construction process for underground excavated station
CN103628889A Quick sealing method for excavating phyllite stratum tunnel
CN103628887A Large-section water-rich saturated fine sand railway tunnel excavation method
CN103628916A Excavation construction method of high-pressure water gushing tunnel
CN103628886A Method for excavating weak surrounding rock tunnel under water-rich high-ground-stress conditions
CN103628915A Dewatering and drainage method for large-section water-rich saturation fine-silt tunnel
CN103628888A Stability augmentation and solidification method for large-section water-rich saturation fine-silt railway tunnel
CN103628890A Soft phyllite tunnel excavation deformation control method
CN103556641A Grooving assisting method for in-pit underground diaphragm wall of existing basement
CN103397892A Shield starting tunnel portal extension steel ring
CN102808516A Tensioning system
CN102787844A Tunnel building method for heading pilot tunnel and inclined shaft on super long tunnel with small-diameter heading machine
CN102787845A Segmented construction method of extra-long tunnels by adopting development machines to construct inclined shafts and headings first