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Yiwen Song
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Guangdong, CN
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Patents Grants
last 30 patents
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Patent Grant
Electric heater
Patent number
D992100
Issue date
Jul 11, 2023
Jingyu Pang
D23 - Environmental heating and cooling
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Patent Grant
Cooling fan
Patent number
D979040
Issue date
Feb 21, 2023
Weikang Yan
D23 - Environmental heating and cooling