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TONG OIL TOOLS CO LTD

Overview
  • Total Patents
    11
  • GoodIP Patent Rank
    232,314
About

TONG OIL TOOLS CO LTD has a total of 11 patent applications. Its first patent ever was published in 2005. It filed its patents most often in WIPO (World Intellectual Property Organization), United States and Canada. Its main competitors in its focus markets civil engineering, machines and electrical machinery and energy are XI AN TONGYUAN PETROTECH CO LTD, GOYENECHE SERGIO F and OWEN OIL TOOLS LP.

Patent filings in countries

World map showing TONG OIL TOOLS CO LTDs patent filings in countries
# Country Total Patents
#1 WIPO (World Intellectual Property Organization) 5
#2 United States 3
#3 Canada 2
#4 China 1

Patent filings per year

Chart showing TONG OIL TOOLS CO LTDs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Cheng Jianlong 9
#2 Zhang Guoan 8
#3 Sun Xianhong 6
#4 Zhang Guo'An 2
#5 Yao Zhizhong 1
#6 Liu Jun 1
#7 Niu Fulong 1
#8 Zhang Hongxi 1
#9 Zhang Yanqun 1
#10 Yu Bin 1

Latest patents

Publication Filing date Title
CN109539920A A kind of top plate fracturing method and device of coal mining
US2013145924A1 Structure for gunpowder charge in combined fracturing perforation device
WO2013090647A1 Composite perforating device with scallops on the inner wall
CA2836447A1 Structure for gunpowder charge in combined fracturing perforating devices
WO2012088985A1 Composite perforation method and device for carrying supporting agent
WO2010102572A1 Cable head for petroleum logging