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For the Inventor, By the Inventor

Beijing, China

21Vianet Group, Inc.

USPTO Granted Patents = 1

% Expired Patents = 100.0

Forward Citations = 8

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3 inventors (with patents filed for the assignee):

goldMedal Letian Yi (1 out of 1 patent)

silverMedal Chong (Ethan) Hao (1 out of 1 patent)

bronzeMedal Zaide Liu (1 out of 2 patents)


1 patent:

1. 8838895 - Solid-state disk caching the top-K hard-disk blocks selected as a function of access frequency and a logarithmic system time (2014-09-16),
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USPTO Data Jan 1 1976 - Oct 20 2026

1 Patents

#1,317 in Beijing

#18,808 in China

Beijing, CN
Beijing, China

21Vianet Group, Inc.

Forward Citations = 8

3 inventors:

goldMedal Letian Yi (1 out of 1 patent)

silverMedal Chong (Ethan) Hao (1 out of 1 patent)

bronzeMedal Zaide Liu (1 out of 2 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: 21Vianet Group, Inc.. Retrieved from https://idiyas.com/company/21vianet-group

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]
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