Learn more

NO 4 ENG CO LTD CHINA RAILWAY 23TH CONSTRUCTION GROUP LTD

Overview
  • Total Patents
    14
  • GoodIP Patent Rank
    125,020
About

NO 4 ENG CO LTD CHINA RAILWAY 23TH CONSTRUCTION GROUP LTD has a total of 14 patent applications. Its first patent ever was published in 2015. It filed its patents most often in China. Its main competitors in its focus markets civil engineering, measurement and chemical engineering are OFFICINE MACCAFERRI ITALIA S R L, MALCOLM MCALPINE and GRINAKER CONSTR LTD.

Patent filings in countries

World map showing NO 4 ENG CO LTD CHINA RAILWAY 23TH CONSTRUCTION GROUP LTDs patent filings in countries
# Country Total Patents
#1 China 14

Patent filings per year

Chart showing NO 4 ENG CO LTD CHINA RAILWAY 23TH CONSTRUCTION GROUP LTDs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Yang Jundong 12
#2 Zeng Yonglin 11
#3 Wang Xiaolong 6
#4 Zhang Peiyu 6
#5 Li Runguo 6
#6 Luo Cheng 6
#7 Mo Hao 6
#8 Wu Yongchun 2
#9 Yang Hongxun 2
#10 Wang Yunpeng 2

Latest patents

Publication Filing date Title
CN112049667A Embedding method and fixing device for tunnel secondary lining middle-buried water stop belt
CN112049660A Device convenient to tunnel preliminary bracing construction
CN111734017A Light partition board mounting structure and mounting method
CN111734030A Mounting construction method for prefabricated building laminated slab
CN111396086A Sleeve method curtain grouting construction method
CN110836115A Tunnel drilling method adjacent to existing building
CN109944256A A kind of underground engineering vertical lift well restoring and fastening method
CN109958119A A kind of underground engineering water level observation well construction method
CN109457735A A kind of concrete wall and the restorative procedure in bottom plate infiltration crack
CN109457993A A kind of concrete column restoring and fastening method
CN109457571A The construction method of ground deformation slot repairing
CN109289402A Dust falling system is used in a kind of construction of enclosure space
CN108239896A Existing railway Disease Treatment of Foundation Base fixed track usage plan constructing structure and construction method
CN106522560A Dynamic sealing grouting cover and using method thereof