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LI QINGZHU

Overview
  • Total Patents
    21
  • GoodIP Patent Rank
    231,457
About

LI QINGZHU has a total of 21 patent applications. Its first patent ever was published in 2003. It filed its patents most often in China. Its main competitors in its focus markets environmental technology and machine tools are JIA ZUYI, WEIHAI AOHUA NEW ENERGY CO LTD and BEIJING HIKEEN TECH CO LTD.

Patent filings in countries

World map showing LI QINGZHUs patent filings in countries
# Country Total Patents
#1 China 21

Patent filings per year

Chart showing LI QINGZHUs patent filings per year from 1900 to 2020

Focus industries

Top inventors

# Name Total Patents
#1 Li Qingzhu 18
#2 Lin Yangyang Li 1
#3 Li Xingrui Chen 1
#4 Chen Long Lin 1
#5 Yang Jinhu 1
#6 Zhang Kanleng 1
#7 Zhang Liwen 1
#8 Ma Yujuan 1

Latest patents

Publication Filing date Title
CN104890089A Blunt knife machining device of wood floor
CN101046329A Two-purpose double water tank solar water heater
CN101046328A Two-purpose solar water heater
CN1967086A Dual-bottle type water heater
CN1967085A Two-purpose water heater
CN1967087A Dual-bottle two-purpose type water heater
CN1952522A Water heater with multi-internal bladder
CN1948858A Water falling and bearing dual purpose solar energy water heater
CN1948848A Water falling and bearing dual purpose water heater
CN1932174A Water-closet secondary cistern
CN1908330A Method for preventing sewage gathering in inner wall of dual-inlet pipeline closet tank
CN1904240A Method of preventing dirt accumulation on inner wall of double water inlet pipe toilet water cistern
CN1877172A Three-way valve for water drain pipe of washbowl
CN1847743A Solar water heater with both heat collecting plate and vacuum tube
CN1847746A Solar energy water heater with auxiliary water tank
CN1840983A Solar water heater
CN1825027A Pipeline arrangine method for solar water heating system controlled by air or liquid
CN1834550A Pipeline system of solar water heater with auxilary water tank
CN1837713A Electric control-free automatic water feeding and emptying arrangement of solar water heater
CN1704536A Water release control device for toilet water tank