How many patents does
The 2Nd Engineering Co., Ltd. Of The 12Th Bureau Group Of China Railway have?
patents
307
families
270
granted
38
applications
269
CN
307
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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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The 2Nd Engineering Co., Ltd. Of The 12Th Bureau Group Of China Railway
Top ten assignees appearing on patents
2009 - 2018
2009
| the 2nd engineering company | 1 |
2018
The 2Nd Engineering Co., Ltd. Of The 12Th Bureau Group Of China Railway
The top ten patent families are
|
Title of patent family (most common patent title) |
Family members |
Filing year |
|---|---|---|
| crts ii type double-block type non-fragment rail bed board construction method | 2 | 2008 |
| underground folding start method for assorted trolleys after shielding | 2 | 2013 |
| method for constructing tunnel with uncovered hole section in middle | 2 | 2011 |
| subway station y-shaped cast steel combining steel pipe post processing and construction… 🛈 | 2 | 2014 |
| method for processing isolated stone groups in shield excavation karren section | 2 | 2011 |
| construction method of opening for allowing highway tunnel parallel pilot tunnel to ente… 🛈 | 2 | 2016 |
| oblique-crossing inclined shaft upper arc guide top brushing construction method for sof… 🛈 | 2 | 2012 |
| shield declination originating technology | 2 | 2012 |
| construction method for treating tunnel deformation segment and accelerating tunneling | 2 | 2012 |
| large-scale aqueduct structure expansion water stop device for water conservancy projects | 2 | 2016 |