30 Utility and 10 Design Patents
#1,506 in Beijing
#3,405 in China
#91,840 in the World
rank by utility patentsForward Citations = 18
Company Filing History:
Beijing Roborock Technology Co., Ltd.
Zhongchao Special Security Technology Co., Ltd
Greentech Environment Co., Ltd.
4. 7 out of 15
China Banknote Printing and Minting Corporation
5. 4 out of 4,280

where one patent can have more than one assignee
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