32 Utility and 1 Design Patents
#478 in Shanghai
#3,164 in China
#83,046 in the World
rank by utility patentsForward Citations = 366
Company Filing History:

Tongji University

4. 2 out of 2
Hunan Sanyou Environmental Technology Co., Ltd
5. 1 out of 832,540 patents
Other
where one patent can have more than one assignee
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