How many patents does
Bohai Sea Petroleum Equipment Manufacturing Co., Ltd., Cnpc have?
patents
697
families
613
granted
77
applications
620
CN
686
WO
3
US
3
RoW
5
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The report contains ten-year analysis with the following sections
- patent filing analysis
- worldwide filing analysis
- patent family analysis
- application analysis
- granted analysis
- classification analysis
- citation analysis
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Bohai Sea Petroleum Equipment Manufacturing Co., Ltd., Cnpc
Top ten assignees appearing on patents
2009 - 2018
2009
Bohai Sea Petroleum Equipment Manufacturing Co., Ltd., Cnpc
The top ten patent families are
|
Title of patent family (most common patent title) |
Family members |
Filing year |
|---|---|---|
| novel prestressed heat-insulation oil pipe | 8 | 2011 |
| connecting device for centrifugal pumps of electrical submersible pump unit | 4 | 2011 |
| energy-saving control method for large-diameter steel pipe transportation vehicle | 2 | 2010 |
| electric energy storage workover rig wide in speed adjustable range | 2 | 2015 |
| centrifuge device used for recycling barite and application method of centrifuge device | 2 | 2015 |
| drill string anti-looseness device | 2 | 2012 |
| transverse wave detection method for defects of spiral weld steel pipe body and flaw det… 🛈 | 2 | 2012 |
| apparatus for grinding weld beading of inside weld of steel tube | 2 | 2015 |
| manufacturing method of x65 steel-grade hfw (high frequency welding) steel pipe for ore … 🛈 | 2 | 2012 |
| v150 steel grade drill rod compression-joint forming process | 2 | 2012 |