How many patents does
Changchun Railway Vehicles Company have?
patents
1,216
families
1,047
granted
110
applications
1,106
CN
1,144
WO
38
US
15
RoW
19
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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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Changchun Railway Vehicles Company
Top ten assignees appearing on patents
2009 - 2018
2018
Changchun Railway Vehicles Company
The top ten patent families are
|
Title of patent family (most common patent title) |
Family members |
Filing year |
|---|---|---|
| top operation safety protection device for vehicle body assembly | 7 | 2009 |
| method of processing gear reduction box | 7 | 2010 |
| full butted joint structure of connector lug between side frame and cross beam of bogie … 🛈 | 7 | 2010 |
| processing method for variable depth, deep-hole drilling, chip-cutting and clearance | 6 | 2010 |
| apparatus for correcting upward deformation of roof portion of stainless steel car | 6 | 2010 |
| composite positioning apparatus for side beam of stainless steel car roof | 6 | 2010 |
| movable measuring apparatus for external contour precision of vehicle body | 5 | 2009 |
| weight reduction re-profiling process after dynamic balance for wheel set of passenger t… 🛈 | 5 | 2009 |
| rain-tightness test device for whole railway vehicle | 4 | 2009 |
| frame assembly base for frame structures | 4 | 2010 |