6 Utility and 3 Design Patents
#6,745 in Beijing
#22,360 in China
#695,828 in the World
rank by utility patentsForward Citations = 36
Company Filing History:



4. 3 out of 3
Guizhou Expressway Group Co., Ltd (cn)
5. 1 out of 2,298

where one patent can have more than one assignee
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