How many patents does
China Railway 12Th Bureau Group Company have?
patents
392
families
340
granted
53
applications
339
CN
392
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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 12Th Bureau Group Company
Top ten assignees appearing on patents
2009 - 2018
2018
China Railway 12Th Bureau Group Company
The top ten patent families are
|
Title of patent family (most common patent title) |
Family members |
Filing year |
|---|---|---|
| tunnel information tracing accurate grouting method | 2 | 2010 |
| folding tunnel widening trolley | 2 | 2012 |
| method for constructing tunnel with low-half cross section being dry powder and fine san… 🛈 | 2 | 2012 |
| positioning support for dowel bars at concrete pavement joints | 2 | 2012 |
| slurry proportioning and construction method for reinforcing dry powder fine sand layer … 🛈 | 2 | 2012 |
| comprehensive construction method applicable to controlling arch basement sedimentation … 🛈 | 2 | 2012 |
| bridge prestress tensioning control and feedback method | 2 | 2012 |
| construction method for miniature steel pipe concrete pile to penetrate through roadbed … 🛈 | 2 | 2012 |
| construction method of fully pouring tunnel inverted arch | 2 | 2012 |
| method for disassembling, lifting and transferring closed type station shield to transfe… 🛈 | 2 | 2012 |