For the Inventor, By the Inventor

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Beijing Zhong-tianfeng Security Protection Technologies Co., Ltd.

USPTO Granted Patents = 1

Forward Citations = 0

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5 inventors (with patents filed for the assignee):

Chuan Jin (1 out of 2 patents)

Jun Han (1 out of 3 patents)

Minnan Zhang (1 out of 1 patent)

4. Jian Li (1 out of 153 patents)

5. Qing Fa Wang (1 out of 81 patents)

1 patent: Sort by Forward Citations

1. 11543351 - All-in-one handheld machine for testing drugs in hairs (2023-01-03),

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USPTO Data Jan 1 1976 - Dec 23 2025

1 Patents

#1,163 in Beijing

#16,077 in China

Beijing Zhong-tianfeng Security Protection Technologies Co., Ltd.

Forward Citations = 0

5 inventors:

Chuan Jin (1 out of 2 patents)

Jun Han (1 out of 3 patents)

Minnan Zhang (1 out of 1 patent)

4. Jian Li (1 out of 153 patents)

5. Qing Fa Wang (1 out of 81 patents)

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