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LIU YANWEN

Overview
  • Total Patents
    20
  • GoodIP Patent Rank
    109,743
About

LIU YANWEN has a total of 20 patent applications. Its first patent ever was published in 2012. It filed its patents most often in China and United States. Its main competitors in its focus markets mechanical elements, pharmaceuticals and chemical engineering are YANGZHOU HUAYE METAL PRODUCTS CO LTD, ERHARD GMBH & CO KG and SUZHOU GAS EQUIPMENT VALVE MFG CO LTD.

Patent filings in countries

World map showing LIU YANWENs patent filings in countries
# Country Total Patents
#1 China 19
#2 United States 1

Patent filings per year

Chart showing LIU YANWENs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Liu Yanwen 20
#2 Ma Nina 15
#3 Meng Li 15
#4 Cui Minghua 4
#5 Zhang Wenying 1
#6 Liu Wei 1
#7 Zhou Lu 1
#8 Wang Hui 1
#9 Chen Shuhe 1
#10 Li Yaping 1

Latest patents

Publication Filing date Title
CN111975036A Steel structure connecting piece system of processing
CN111843758A Chain wheel production equipment and method
CN111536337A Linkage locking flange
CN111536328A Improved connecting pipe clamp
CN111536279A Precision control liquid flow valve
CN111520551A Improved connecting piece for directly-buried heat-insulating pipeline
CN111520550A Improved quick connecting piece for pipe fittings
CN110425323A A kind of shut-off valve
CN110469682A A kind of blowdown valve
CN110425302A A kind of improved ball valve
CN110206918A A kind of hydraulic control one-way valve
CN110220053A A kind of control valve based on flanged joint
CN110206896A A kind of shut-off valve
CN110127236A A kind of automobile-used breather valve of oil tank
CN110206893A A kind of shut-off valve convenient for adjusting
CN103340213A Specific drug for preventing plant viruses and preparation method of drug
CN103396172A Multifunctional bio-fertilizer and preparation method thereof
CN103360175A Specific continuous cropping resistance agent and preparation method thereof
CN103340207A Environmentally-friendly special effect agent for killing red spiders and production method thereof