How many patents does
China Oilfield Services have?
patents
1,395
families
1,100
granted
291
applications
1,104
CN
1,357
US
17
WO
9
RoW
12
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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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patents
42 million
patent families
23 million
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China Oilfield Services
Top ten assignees appearing on patents
2009 - 2018
China Oilfield Services
The top ten patent families are
|
Title of patent family (most common patent title) |
Family members |
Filing year |
|---|---|---|
| pup joint for releasing sidewall contact of stratigraphic test device and apparatus | 7 | 2012 |
| measuring device for measuring consistency of cement slurry for a consistometer | 6 | 2010 |
| submarine device | 6 | 2007 |
| high-temperature carbon dioxide corrosion inhibitor | 5 | 2013 |
| drilling type side-wall coring device | 5 | 2014 |
| conducting wire following protection structure of electric speed reducer | 5 | 2016 |
| rock formation testing method and formation testing instrument | 4 | 2013 |
| multielement thermal fluid oil production technology with adjustable components | 4 | 2013 |
| system for sampling from formation while drilling | 3 | 2014 |
| instrument pressure-bearing connecting device and structure | 3 | 2013 |