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YANCHENG DONGRONG PETROLEUM MACHINERY CO LTD

Overview
  • Total Patents
    11
  • GoodIP Patent Rank
    156,236
  • Filing trend
    ⇩ 100.0%
About

YANCHENG DONGRONG PETROLEUM MACHINERY CO LTD has a total of 11 patent applications. It decreased the IP activity by 100.0%. 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, engines, pumps and turbines and mechanical elements are SIMPSON NEIL A A, ABERNETHY ANDERSON CHARLES and KLEPPA ERLING.

Patent filings in countries

World map showing YANCHENG DONGRONG PETROLEUM MACHINERY CO LTDs patent filings in countries
# Country Total Patents
#1 China 11

Patent filings per year

Chart showing YANCHENG DONGRONG PETROLEUM MACHINERY CO LTDs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Wang Yugang 11

Latest patents

Publication Filing date Title
CN111119782A Blowout prevention box
CN110410011A It is a kind of with prevent bit port block helicoid hydraulic motor
CN110374555A A kind of casing scraper with variable diameter function
CN110410025A A kind of unloader of beam-pumping rod being easily installed
CN110410029A A kind of efficient variable diameter junk mill
CN107387831A A kind of multiple-directional control valve for petroleum machinery
CN107218082A A kind of pneumatic vane motor with lubricant passage way
CN107227941A A kind of sucker rod wax scraping device
CN107178341A A kind of casing oil extractor tool
CN105257232A Hydraulic oil pipe inner cutting knife
CN105257237A Controllable pressure-type sucker rod blowout preventer