Learn more

QINGHUA TONGFANG CO LTD

Overview
  • Total Patents
    29
About

QINGHUA TONGFANG CO LTD has a total of 29 patent applications. Its first patent ever was published in 1997. It filed its patents most often in China and Japan. Its main competitors in its focus markets environmental technology, thermal processes and consumer goods are CHINA SCIENCES HENGDA GRAPHITE, MIL MAN OLEG OSHEREVICH and XU HEMING.

Patent filings in countries

World map showing QINGHUA TONGFANG CO LTDs patent filings in countries
# Country Total Patents
#1 China 28
#2 Japan 1

Patent filings per year

Chart showing QINGHUA TONGFANG CO LTDs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Jiang Yi 10
#2 Shi Wenxing 3
#3 Luo Lu 2
#4 Zhu Yanwu 2
#5 Zhao Youping 2
#6 Yan Qisen 2
#7 Wei Qingfan 2
#8 Zhang Yinping 2
#9 Zhao Weiguo 2
#10 Li Shuhui 2

Latest patents

Publication Filing date Title
CN1590220A Device for closed transferring and packing sludge
CN1590385A Method of extracting soyabean isoflavone and soya bean saponin for soya bean whey waste water
CN1590323A Negative pressure moving type sludge drying treatment equipment
CN1475293A Manufacturing method of fiber ball filtering material and its device
CN1475292A Fiber ball filtering device
CN1464365A Communication interface unit for digitalized family control network system
CN1464281A A closed-type external ice thawing ice-accumulating chamber
CN1451462A Method and device for cleaning harmful component of flue gas
CN1417654A Site controlling computer of distributed control system
CN1417695A Internal module connecting bus for site controlling computer and its realization method
CN1414287A Heat supply device capable of recovering aqueous vapour latent heat in fuel gas, fuel oil boiler flue gas
CN1312526A Experimental set-up showing computer composition principle
CN1359237A Cable television network basd personalized television advertisement transmitting and receiving system
CN1341831A Air-conditioner tail end equipment capable of simulating natural wind
CN1335629A Interlamellar passage making method and structure for laminated inductor
CN1334390A Modular cold/heat supply roof plates with ventilation port, water source and radiation
CN1334391A Modular cold/heat supplying roof plates with water source and radiation
CN1311419A High supercooling degree supercooler of ice cold storage air conditioner supercooling water dynamic ice making system
CN1295951A Location apparatus and method for anti-robbing and anti-theft system of car
CN1289960A Communication interface of miniaturized self-recorder