Qin Cai has been granted 13 US patents while listed as an inventor at Microsoft . The first was granted in 2010 and the most recent in July 2025. Qin Cai ranks #362,438 of 4,157,543 US inventors in our database (top 8.7%). Patent records list Qin Cai in Haikou, WA, CN.
Patents per Year Patents granted per year, 2010 to 2025 Bar chart with a peak of 4 patents in 2018. peak 4 2010: 2 patents 2010 2012: 1 patents 2012 2013: 1 patents 2013 2014: 1 patents 2014 2016: 1 patents 2016 2017: 2 patents 2017 2018: 4 patents 2018 2025: 1 patents 2025
Issued Patents All Time
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Showing 1–13 of 13 patents
Patent # Title Co-Inventors Date Approx Value ⓘ
12344622 Refining method of midbody of latamoxef sodium Yifeng Lu , Xingyu Chen 2025-07-01
10146305 Eye gaze tracking using binocular fixation constraints Zhengyou Zhang 2018-12-04
$68,963,000
10083925 Packaging process of electronic component Da-Jung Chen 2018-09-25
9875977 Packaging process of electronic component Da-Jung Chen 2018-01-23
9864430 Gaze tracking via eye gaze model Dijia Wu , Michael J. Conrad , Tim W. Burrell , Xu Miao , Zicheng Liu +1 more 2018-01-09
$35,614,000
9684827 Eye gaze tracking based upon adaptive homography mapping Zhengyou Zhang , Zicheng Liu , Jia-Bin Huang 2017-06-20
$31,379,000
9552061 Eye gaze tracking using binocular fixation constraints Zhengyou Zhang 2017-01-24
$42,640,000
9430040 Eye gaze detection with multiple light sources and sensors Zhengyou Zhang , Anoop Gupta 2016-08-30
$26,338,000
8675926 Distinguishing live faces from flat surfaces Zhengyou Zhang , Pieter Kasselman , Arthur H. Baker 2014-03-18
$35,700,000
8605890 Multichannel acoustic echo cancellation Zhengyou Zhang 2013-12-10
$31,292,000
8339459 Multi-camera head pose tracking Zhengyou Zhang , Aswin C. Sankaranarayanan , Qing Zhang , Zicheng Liu 2012-12-25
7844456 Grammar confusability metric for speech recognition John Hamaker 2010-11-30
$23,766,000
7748030 Licensing digital content use Erik W. Selberg , David B. Hedbor , Chelsea Celest Krueger 2010-06-29
$5,793,000
