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Speaker
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Patent number 10,735,864
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Issue date Aug 4, 2020
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SHENZHEN GRANDSUN ELECTRONIC CO., LTD.
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Weiyong Gong
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Metal diaphragm and speaker
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Patent number 10,694,294
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Issue date Jun 23, 2020
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SHENZHEN GRANDSUN ELECTRONIC CO., LTD.
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Gang Xie
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Diaphragm and speaker
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Patent number 10,667,058
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Issue date May 26, 2020
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SHENZHEN GRANDSUN ELECTRONIC CO., LTD.
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Gang Xie
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Speaker and headphone
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Patent number 10,499,140
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Issue date Dec 3, 2019
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SHENZHEN GRADSUN ELECTRONIC CO., LTD.
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Weiyong Gong
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H04 - ELECTRIC COMMUNICATION TECHNIQUE