Inventor
ZHANG YUDONG
US21 patents
⚠️ This page may combine multiple inventors who share the name “ZHANG YUDONG”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
ALIBABA GROUP HOLDING LTD
7 patentsUS9686269B2Jun 20, 2017
Method and system for distinguishing humans from machines and for controlling access to network services
ALIBABA GROUP HOLDING LTD6 citations84
US9258302B2Feb 9, 2016
Method and system for distinguishing humans from machines
ALIBABA GROUP HOLDING LTD7 citations83
US9571490B2Feb 14, 2017
Method and system for distinguishing humans from machines
ALIBABA GROUP HOLDING LTD5 citations72
US10356114B2Jul 16, 2019
Method and system of distinguishing between human and machine
ALIBABA GROUP HOLDING LTD0 citations52
US10104061B2Oct 16, 2018
Method and system for distinguishing humans from machines and for controlling access to network services
ALIBABA GROUP HOLDING LTD1 citations52
US9529999B2Dec 27, 2016
Method and system of distinguishing between human and machine
ALIBABA GROUP HOLDING LTD1 citations52
US9648008B2May 9, 2017
Terminal identification method, and method, system and apparatus of registering machine identification code
ALIBABA GROUP HOLDING LTD0 citations41
INST OPTICS & ELECTRONICS CAS
3 patentsUS9693829B2Jul 4, 2017
Microscopic surgery system and navigation method guided by optical coherence tomography (OCT) and automated OCT imaging field calibration
INST OPTICS & ELECTRONICS CAS8 citations81
US9610022B1Apr 4, 2017
Adaptive optical objective inspection instrument for optic nerve function
INST OPTICS & ELECTRONICS CAS2 citations70
US10070782B2Sep 11, 2018
Adaptive optical retina imaging device and method
INST OPTICS & ELECTRONICS CAS0 citations39
INST OPTICS & ELECT CN ACAD
3 patentsUS8020991B2Sep 20, 2011
Two-eye adaptive optical visual perception training method and apparatus thereof
INST OPTICS & ELECT CN ACAD7 citations80
US8020992B2Sep 20, 2011
Human eye adaptive optical visual perception training method and apparatus thereof
INST OPTICS & ELECT CN ACAD8 citations80
US8814358B1Aug 26, 2014
Binocular adaptive optics visual simulator and method for binocular adaptive optics visual simulation
INST OPTICS & ELECT CN ACAD3 citations59