Inventor
LIAO HONGSHU
US4 patents
Patents
4 patentsUS10044725B2Aug 7, 2018
Controlling access to online resources using device validations
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US9760700B2Sep 12, 2017
Image based CAPTCHA challenges
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US10042992B2Aug 7, 2018
Image based CAPTCHA challenges
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US10402555B2Sep 3, 2019
Browser attestation challenge and response system
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