How many patents does
North China Grid Company have?
patents
260
families
170
granted
77
applications
183
CN
247
WO
8
EP
4
US
1
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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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North China Grid Company
Top ten assignees appearing on patents
2009 - 2018
2009
| north china grid company | 19 |
2018
North China Grid Company
The top ten patent families are
|
Title of patent family (most common patent title) |
Family members |
Filing year |
|---|---|---|
| direct-current circuit breaker and implementation method therefor | 6 | 2013 |
| passive high-voltage direct-current circuit breaker and implementation method therefor | 5 | 2014 |
| repulsion operation mechanism | 3 | 2014 |
| auxiliary analyzing method for day-ahead scheduling-plan optimization in mode of wind-fi… 🛈 | 3 | 2013 |
| ultra high speed mechanical switch, switch fracture thereof and switch contacts thereof | 3 | 2014 |
| ultra-high-speed mechanical switch | 3 | 2014 |
| method for analyzing influence of output power fluctuation of wind farm on power grid | 3 | 2011 |
| direct current breaker bridge type module | 3 | 2014 |
| guide rope unwinding method | 2 | 2010 |
| method for calculating sensitivity of wind power plant reactive power on voltage based o… 🛈 | 2 | 2012 |