How many patents does
Cnpc Great Wall Drilling Company have?
patents
743
families
660
granted
83
applications
660
CN
743
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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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Cnpc Great Wall Drilling Company
Top ten assignees appearing on patents
2009 - 2018
2018
Cnpc Great Wall Drilling Company
The top ten patent families are
|
Title of patent family (most common patent title) |
Family members |
Filing year |
|---|---|---|
| method for detecting stratum boundary and measuring stratum specific resistance | 2 | 2016 |
| fixing structure for transformer unit and transformer component | 2 | 2012 |
| evaluation method for stratum anisotropy | 2 | 2012 |
| automatic seal joint for hydraulic pressure of through casing resistivity logging unit | 2 | 2012 |
| method and device for determining depth of instrument in well | 2 | 2012 |
| multipoint interpolation well diameter scale device | 2 | 2012 |
| secondary heat exchange non-inductive hot air circulating oven | 2 | 2012 |
| pole plate electrode system for logging instrument | 2 | 2012 |
| mandrel assembly for induction logging instrument probe nipple and manufacturing method … 🛈 | 2 | 2012 |
| fixing structure for transformer pup joint and transformer pup joint | 2 | 2012 |