How many patents does
China Railway First Group Company have?
patents
363
families
286
granted
81
applications
282
CN
363
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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 First Group Company
Top ten assignees appearing on patents
2009 - 2018
2018
China Railway First Group Company
The top ten patent families are
|
Title of patent family (most common patent title) |
Family members |
Filing year |
|---|---|---|
| transverse galling machine and galling treatment method | 3 | 2015 |
| airbag type inner framework form traveler and primary tunnel supporting shotcrete constr… 🛈 | 2 | 2015 |
| loess strata subway tunnel earth pressure balance shield construction method | 2 | 2012 |
| piling beam cofferdam construction method used for bare rock foundation construction in … 🛈 | 2 | 2011 |
| multipurpose tunnel operating vehicle | 2 | 2011 |
| minus-ring-free originating construction method for constructing sectional shield tunnel | 2 | 2011 |
| bentonite grouting method for construction of shield tunnel | 2 | 2011 |
| control system for integrated synchronous jacking of cut pier and control method | 2 | 2011 |
| concrete structure construction maintenance method in severe environment | 2 | 2012 |
| pushing device for bridge erecting machine to pass roadbed and method for bridge erectin… 🛈 | 2 | 2012 |