5 Utility and 2 Design Patents
#1 in Yueyang
#27,091 in China
#826,892 in the World
rank by utility patentsForward Citations = 9
Company Filing History:
China Petroleum & Chemical Corporation
Hunan Changling Petrochemical Science and Technology Development Co., Ltd

4. 1 out of 1
Hunan Zhongchuang Chemical Co., Ltd.
where one patent can have more than one assignee
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