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HENAN DONGFANGLONG MACHINE MFT CO LTD

Overview
  • Total Patents
    13
  • GoodIP Patent Rank
    127,729
About

HENAN DONGFANGLONG MACHINE MFT CO LTD has a total of 13 patent applications. Its first patent ever was published in 2016. It filed its patents most often in China. Its main competitors in its focus markets civil engineering, transport and machine tools are HU ENWEI, NPP NEFTETRUBOSERVIS AOZT and ANTON OILFIELD SERVICES GROUP LTD.

Patent filings in countries

World map showing HENAN DONGFANGLONG MACHINE MFT CO LTDs patent filings in countries
# Country Total Patents
#1 China 13

Patent filings per year

Chart showing HENAN DONGFANGLONG MACHINE MFT CO LTDs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Du He 11
#2 Gong Xingyun 7
#3 Zhang Ziping 7
#4 Zhang Yanhua 7
#5 Bie Xinyun 6
#6 Liang Xiuxia 5
#7 Li Jiafei 5
#8 Zhang Yongxin 5
#9 Gong Zongqi 5
#10 Zhang Jiamiao 3

Latest patents

Publication Filing date Title
CN112139881A Portable slip ring electric polishing device and application method
CN112145117A Downhole throttling device and application method
CN112158033A Automobile anti-skid device used in winter and application method
CN112145136A Load-reducing single-action pump of rodless discharge underground device and application method
CN112264850A Plunger pump crankshaft grinding device and application method
CN109915102A High-efficient elastic strainer shakes separator and application method
CN106640622A Integrated oil inlet device of oil well pump and applying method
CN106522858A Safe anti-jacking slip and application method
CN106625443A Multi-purpose well-patrolling tool and application method
CN106639970A Multifunctional well completion pipe string sealing performance detecting device and application method
CN106585747A Mobile intelligent power-generating car and application method thereof
CN105756657A High-efficient multi-stage cyclone self-cleaning separator and application method
CN105696982A Sand prevention tool vibrating together with pumping filter screen of oil well pump and application method