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2ND ENGINEERING CO LTD 12TH BUREAU GROUP CHINA RAILWAY

Overview
  • Total Patents
    59
  • GoodIP Patent Rank
    40,332
About

2ND ENGINEERING CO LTD 12TH BUREAU GROUP CHINA RAILWAY has a total of 59 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, it methods for management and measurement are SUBWAY ENG CO LTD OF CHINA RAILWAY 16TH BUREAU GROUP CO LTD, HYUN E & C and CHINA RAILWAY TUNNEL SURVEY & DESIGN INST CO LTD.

Patent filings in countries

World map showing 2ND ENGINEERING CO LTD 12TH BUREAU GROUP CHINA RAILWAYs patent filings in countries
# Country Total Patents
#1 China 59

Patent filings per year

Chart showing 2ND ENGINEERING CO LTD 12TH BUREAU GROUP CHINA RAILWAYs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Zhao Xiangping 16
#2 Lei Jun 16
#3 Wu Haijun 7
#4 Wang Zongyong 7
#5 Li Gang 6
#6 Chen Qian 5
#7 Zhang Yan 5
#8 Zhang Yumin 5
#9 Liu Xuebing 5
#10 Wu Mingjing 5

Latest patents

Publication Filing date Title
CN111578026A Under-pressure cutting construction method for water supply pipelines made of different materials
CN111255466A Construction method for single shaft starting by changing tunnel into shield by mining method
CN110965584A Access and exit earthwork excavation and passage opening concrete breaking synchronous construction method
CN110988992A Advanced geological forecasting method for mining method construction
CN110965581A Protection construction method for underground pipeline in subway construction
CN110985021A Long-distance river-crossing construction method for earth pressure balance shield
CN110761800A Air-assisted launching construction method of launching well in underground excavation tunnel shield machine
CN111042166A Spiral plugging device and method for deep foundation pit dewatering well
CN110792441A Construction method for treating deep-buried cross-foundation pit waste pipeline
CN110777860A Method for grouting and plugging back of side wall leakage water of subway station
CN110080301A A kind of construction method that subway station underground continuous wall-enclosure structure punches
CN109973116A A kind of tunnel segment structure and its construction method of the anti-floating of shield tunnel
CN109680690A Diaphram wall steel reinforcement cage merogenesis construction method for hanging under low-headroom condition
CN108867693A The construction method of existing pipe gallery reinforcement protection
CN108867692A The protection of city big cross section open trench tunnel Nearby Structure and tunnel foundation pit method for digging
CN108951648A Open trench tunnel layer of sand Sand foundation ditch strengthening method
CN108843346A Lining construction method of the large section shallow-depth-excavation tunnel in water-rich sand layer
CN108952765A Construction method of the super steel tube shed in water-rich sand layer advance support
CN108951647A Construction method for supporting is excavated in hole in the hole of open trench tunnel
CN108910708A Safety management system and method for managing security in processing factory