How many patents does
China Railway No. 3 Engineering Group Company have?
patents
479
families
415
granted
66
applications
413
CN
479
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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 No. 3 Engineering Group Company
Top ten assignees appearing on patents
2009 - 2018
2009
2018
China Railway No. 3 Engineering Group Company
The top ten patent families are
|
Title of patent family (most common patent title) |
Family members |
Filing year |
|---|---|---|
| tunnel karst cave ultra-large volume concrete hierarchical and regional preserved hole a… 🛈 | 2 | 2014 |
| segment hoisting hole anti-drawing dynamic testing method and testing device | 2 | 2015 |
| tunnel double-lining plug with automatic periphery attachment function and waterstop cla… 🛈 | 2 | 2015 |
| construction method for inverted arch of vi-level water-enriched surrounding rock tunnel | 2 | 2012 |
| multilevel-control-network gps (global positioning system) optimization measurement meth… 🛈 | 2 | 2012 |
| precision measurement control method of metro track structure construction | 2 | 2012 |
| high-pressure impact spray drilling machine for hole collapse strata and construction me… 🛈 | 2 | 2015 |
| multifunctional cantilever offset detector | 2 | 2012 |
| monolithic roadbed and tunnel bottom disease treatment method based on combined support … 🛈 | 2 | 2015 |
| construction method applicable to constructing special-shaped big deep crossing joint fo… 🛈 | 2 | 2015 |