23 Utility Patents
#21 in Qingdao
#4,892 in China
#139,030 in the World
Forward Citations = 2
Company Filing History:
Qingdao University of Technology
Ningbo Sanhan Alloy Material Co., Ltd.
Hanergy (qingdao) Lubrication Technology Co., Ltd.
4. 2 out of 7
Shanghai Jinzhao Energy Saving Technology Co., Ltd
5. 2 out of 2
Qingdao Sisa Abrasives Co., Ltd.
where one patent can have more than one assignee
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