How many patents does
China Railway Construction Heavy Industry Company have?
patents
339
families
272
granted
65
applications
274
CN
337
WO
1
RoW
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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China Railway Construction Heavy Industry Company
Top ten assignees appearing on patents
2009 - 2018
2009
2018
China Railway Construction Heavy Industry Company
The top ten patent families are
|
Title of patent family (most common patent title) |
Family members |
Filing year |
|---|---|---|
| slurry shield stone breaking device and slurry shield tunneling machine with same | 2 | 2014 |
| special-shaped steel rail and steel rail glue joint insulating joint | 2 | 2015 |
| replacement device for shield cutters | 2 | 2014 |
| method and device for monitoring rotating position of swing mechanism of segment erector | 2 | 2014 |
| automatic control system for left and right tracks to travel synchronously | 2 | 2015 |
| slurry shield tunneling machine flushing water pressure control system and control method | 2 | 2015 |
| side roof bolter | 2 | 2015 |
| muddy water circulation and stone crushing method for shield tunneling machine | 2 | 2015 |
| compensator for slurry balance shield mud circulation system | 2 | 2015 |
| structure for avoiding deflection of single propulsion oil cylinder piston rod of shield… 🛈 | 2 | 2015 |