For the Inventor, By the Inventor

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Qingdao Gren Technology Co., Ltd.

USPTO Granted Patents = 2

Forward Citations = 19

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2 inventors (with patents filed for the assignee):

Rong Liu (2 out of 4 patents)

Jian Zhang (1 out of 24 patents)

2 patents: Sort by Forward Citations

1. D790511 - Horizontal sound box (2017-06-27),

2. D787472 - Vertical sound box (2017-05-23),

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USPTO Data Jan 1 1976 - Jan 6 2026

2 Patents

#107 in Qingdao

#10,046 in China

Qingdao Gren Technology Co., Ltd.

Forward Citations = 19

2 inventors:

Rong Liu (2 out of 4 patents)

Jian Zhang (1 out of 24 patents)

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