Dayu Qu has been granted 13 US patents while listed as an inventor at Apple . The first was granted in 2005 and the most recent in June 2025. Dayu Qu ranks #362,438 of 4,157,543 US inventors in our database (top 8.7%). Patent records list Dayu Qu in Cupertino, CA, US.
Patents per Year Patents granted per year, 2005 to 2025 Bar chart with a peak of 3 patents in 2006. peak 3 2005: 1 patents 2005 2006: 3 patents 2006 2011: 1 patents 2011 2012: 1 patents 2012 2016: 1 patents 2016 2018: 1 patents 2018 2019: 1 patents 2019 2022: 2 patents 2022 2025: 2 patents 2025
Issued Patents All Time
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Showing 1–13 of 13 patents
Patent # Title Co-Inventors Date Approx Value ⓘ
12341508 Input device having adjustable input mechanisms Paul X. Wang , John C. DiFonzo , Zheng Gao , Chang Zhang 2025-06-24
12308645 Alternating-current power harmonic-based circuit state detection Xiaohu Zhou 2025-05-20
11500538 Keyless keyboard with force sensing and haptic feedback Alex J. Lehmann , Chang Zhang , Kenneth M. Silz , Paul X. Wang , Qiliang Xu +3 more 2022-11-15
$272,708,000
11394385 Input device having adjustable input mechanisms Paul X. Wang , John C. DiFonzo , Zheng Gao , Chang Zhang 2022-07-19
$234,734,000
10353485 Multifunction input device with an embedded capacitive sensing layer Chang Zhang , Golnaz Abdollahian , Paul X. Wang , Ray L. Chang , John Gabriel Buckmaster 2019-07-16
$90,112,000
9952682 Depressible keys with decoupled electrical and mechanical functionality Chang Zhang , Ray L. Chang , John S. Camp 2018-04-24
$65,456,000
9229500 Acoustic noise reduction in power supply inductors — 2016-01-05
$62,283,000
8151128 Computer system power source with improved light-load efficiency — 2012-04-03
$221,850,000
7915987 Acoustic noise reduction in power supply inductors — 2011-03-29
$71,608,000
7075799 Self-driven synchronous rectifier circuit — 2006-07-11
$5,294,000
7034647 Integrated magnetics for a DC-DC converter with flexible output inductor Liang Yan , Bradley M. Lehman 2006-04-25
6989612 Dynamic control of power converter output voltage slew rate Lorenzo Cividino 2006-01-24
$2,937,000
6914348 Dynamic control of power converter output voltage slew rate Lorenzo Cividino 2005-07-05
$5,589,000
