31 Utility and 4 Design Patents
#8 in Zhejiang
#3,309 in China
#87,612 in the World
rank by utility patentsForward Citations = 64
Company Filing History:

Okin Refined Electric Technology Co., Ltd
Zhejiang Sunny Optics Co., Ltd.
4. 1 out of 1
Hangzhou Yue Fu Si Technology Co., Ltd.
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