How many patents does
China University Of Petroleum have?
patents
5,682
families
4,494
granted
1,121
applications
4,561
CN
5,578
US
48
WO
38
EP
3
KR
2
RoW
13
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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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China University Of Petroleum
Top ten assignees appearing on patents
2009 - 2018
2018
China University Of Petroleum
The top ten patent families are
|
Title of patent family (most common patent title) |
Family members |
Filing year |
|---|---|---|
| method and system for improving drilling speed by using drill string vibration | 11 | 2011 |
| visco-elastic strain field ground stress measurement device and measurement method | 10 | 2015 |
| movable combined sand control pipe of axial and radial slotted screen pipes | 9 | 2014 |
| automatic pressure compensating type differential-pressure ejecting continuous particle … 🛈 | 6 | 2015 |
| tool and method for controlling drilling noise of hollow power drilling tool for undergr… 🛈 | 5 | 2015 |
| automatic observation apparatus for detecting mineral samples | 5 | 2014 |
| supersonic expansion refrigeration and cyclone separation device for natural gas | 5 | 2011 |
| simulated experiment testing method of gas hydrate in porous medium | 5 | 2015 |
| novel inorganic fine particle enhanced foam system for oil and gas fields, and preparati… 🛈 | 5 | 2015 |
| method for synthesizing polymethoxy acetal | 5 | 2013 |