How many patents does
China Railway Tunnels Group Company have?
patents
292
families
214
granted
80
applications
212
CN
292
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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 Tunnels Group Company
Top ten assignees appearing on patents
2009 - 2018
2018
China Railway Tunnels Group Company
The top ten patent families are
|
Title of patent family (most common patent title) |
Family members |
Filing year |
|---|---|---|
| test platform used in researching tunnel boring machine tool rock breaking mechanism | 2 | 2011 |
| arch center mounting device for construction of tunnel | 2 | 2010 |
| vibration balancing anchor device | 2 | 2010 |
| adjustable prestressed anchoring device | 2 | 2010 |
| tunnel surrounding rock radial stress strain distributed monitoring technology | 2 | 2010 |
| method for performing backfill grouting on pea gravel by adoption of shield type tbm in … 🛈 | 2 | 2013 |
| method for building urban underground tunnel shield cutter repairing space with preset r… 🛈 | 2 | 2013 |
| method for repairing tbm (tunnel boring machine) cutter head in intra-tunnel high-pressu… 🛈 | 2 | 2013 |
| tunnel waterproof material laying equipment and method | 2 | 2010 |
| transverse adjustable ground roller mounting mechanism | 2 | 2010 |