How many patents does
China Railway No.4 Engineering Group Company have?
patents
265
families
207
granted
58
applications
207
CN
264
WO
1
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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.4 Engineering Group Company
Top ten assignees appearing on patents
2009 - 2018
2018
China Railway No.4 Engineering Group Company
The top ten patent families are
|
Title of patent family (most common patent title) |
Family members |
Filing year |
|---|---|---|
| steel bar connection mode of precast concrete components and application thereof | 3 | 2014 |
| steel trestle construction method and facility with percussion drill limiting pore-formi… 🛈 | 3 | 2015 |
| working face reinforcing structure in shield machine cabin as well as construction metho… 🛈 | 3 | 2011 |
| integral moving formwork for stalk concrete pouring and application thereof | 3 | 2014 |
| tire type online traveling cement-emulsified asphalt mortar stirring and pouring vehicle | 2 | 2010 |
| method for preparing cement mortar | 2 | 2010 |
| modularized steel plate sleeper for bridging at tunnel portal and bridging method | 2 | 2015 |
| method for rapidly measuring high-speed loop of test field | 2 | 2015 |
| double-line construction method for double-block ballastless track bed board of railway … 🛈 | 2 | 2009 |
| water supply and drainage device for deep foundation pit and construction method based o… 🛈 | 2 | 2015 |