% Expired Patents = 100.0

Forward Citations = 20

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4 inventors (with patents filed for the assignee):

Hao Yi Liang (2 out of 2 patents)

Qingfu Xu (2 out of 2 patents)

Bill Piu Chan (2 out of 7 patents)

4. Francis Chi (2 out of 11 patents)

2 patents: Sort by Forward Citations

1. 9283198 - Materials and methods for treating viral infections (2016-03-15),

2. 8415398 - Materials and methods for treating viral infections (2013-04-09),

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USPTO Data Jan 1 1976 - Oct 20 2026

2 Patents

#1,196 in Hong Kong

#11,632 in China

Hong Kong, China

Obio Pharmaceutical (h.k.) Limited

Forward Citations = 20

4 inventors:

Hao Yi Liang (2 out of 2 patents)

Qingfu Xu (2 out of 2 patents)

Bill Piu Chan (2 out of 7 patents)

4. Francis Chi (2 out of 11 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Obio Pharmaceutical (h.k.) Limited. Retrieved from https://idiyas.com/company/obio-pharmaceutical-h-k

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]