How many patents does
National-Oilwell Dht have?
patents
292
families
56
granted
49
applications
243
US
78
WO
56
GB
41
EP
21
CN
8
RoW
88
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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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National-Oilwell Dht
Top ten assignees appearing on patents
2009 - 2018
| national-oilwell dht | 262 |
| national oilwell varco | 12 |
| national-oilwell | 1 |
| national oilwell dht, l. p. | 1 |
| nat oilwell dht | 1 |
2009
| national-oilwell dht | 3 |
| national-oilwell | 1 |
2018
| national-oilwell dht | 44 |
National-Oilwell Dht
The top ten patent families are
|
Title of patent family (most common patent title) |
Family members |
Filing year |
|---|---|---|
| downhole cutting tool | 16 | 2011 |
| dispersion of hardphase particles in an infiltrant | 14 | 2011 |
| polycrystalline diamond cutting element | 12 | 2010 |
| fixed cutter drill bit with flow guide | 12 | 2014 |
| fixed cutter drill bit cutter elements including hard cutting tables made from cvd synth… 🛈 | 10 | 2012 |
| polycrystalline diamond cutting element and method of using same | 9 | 2010 |
| preparation of nanocrystalline diamond coated diamond particles and applications thereof | 9 | 2012 |
| downhole measurement assembly, tool and method | 9 | 2012 |
| system and method for sealing a wellbore | 8 | 2010 |
| wellsite hardfacing with distributed hard phase and method of using same | 8 | 2015 |