How many patents does
Qiqihar Railway Rolling Stock Company have?
patents
1,045
families
634
granted
208
applications
837
CN
773
WO
51
US
42
EP
8
RoW
171
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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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Qiqihar Railway Rolling Stock Company
Top ten assignees appearing on patents
2009 - 2018
Qiqihar Railway Rolling Stock Company
The top ten patent families are
|
Title of patent family (most common patent title) |
Family members |
Filing year |
|---|---|---|
| bogie and side frame thereof | 19 | 2012 |
| railway wagon bogie and railway wagon | 13 | 2011 |
| freight car bogie and freight car | 12 | 2009 |
| bottom gate device and hopper car using the same | 12 | 2011 |
| bottom door opening-closing mechanism, bottom door device and drop-bottom hopper car | 11 | 2011 |
| lower locking pin body two-side operating coupler and draft gear | 11 | 2009 |
| swing bolster, swing bolster vibration reduction assembly and bogie | 11 | 2013 |
| coupler yoke and coupler draft gear | 11 | 2011 |
| side wall and boxcar of railway wagon | 11 | 2010 |
| coupler draft gear, double-side operating coupler and lower lockpin rotation shaft assem… 🛈 | 10 | 2009 |