% Expired Patents = 100.0

Forward Citations = 1

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4 inventors (with patents filed for the assignee):

Bai Jianxiong (1 out of 1 patent)

Shihao Chen (1 out of 3 patents)

Junxia Chen (1 out of 1 patent)

4. Sijun Chen (1 out of 1 patent)

1 patent: Sort by Forward Citations

1. 9571926 - High-efficiency low-voltage-power-supply high-power-output audio driver architecture (2017-02-14),

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

1 Patents

#1,386 in Shanghai

#18,808 in China

Shanghai, China

Christopher Technology (Shanghai) Limited

Forward Citations = 1

4 inventors:

Bai Jianxiong (1 out of 1 patent)

Shihao Chen (1 out of 3 patents)

Junxia Chen (1 out of 1 patent)

4. Sijun Chen (1 out of 1 patent)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Christopher Technology (Shanghai) Limited. Retrieved from https://idiyas.com/company/christopher-technology-shanghai

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]