How many patents does
National Oilwell Varco have?
patents
3,566
families
518
granted
818
applications
2,748
US
913
WO
555
EP
460
GB
260
CN
208
KR
18
JP
3
RoW
1,149
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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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patent families
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National Oilwell Varco
Top ten assignees appearing on patents
2009 - 2018
National Oilwell Varco
The top ten patent families are
|
Title of patent family (most common patent title) |
Family members |
Filing year |
|---|---|---|
| method and apparatus for reducing stick-slip | 39 | 2008 |
| apparatus and method for severing a wellbore tubular | 38 | 2006 |
| apparatus and method for separating solids from a solids laden drilling fluid | 30 | 2010 |
| bi-directionally raisable drilling rig mast | 29 | 2012 |
| downhole motor with concentric rotary drive system | 29 | 2012 |
| apparatus and method for separating solids from a solids laden drilling fluid | 28 | 2008 |
| coupling assembly and protective ring therefor | 26 | 2006 |
| blowout preventer blade assembly and method of using same | 26 | 2010 |
| screen assembly and a method for making same | 26 | 2011 |
| mud pump modules with surge dampeners | 25 | 2008 |