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Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
XL

Xulei Liu — 6 Patents

Amazon: 6 patents #2,730 of 19,158Top 15%
Watertown, MA: #335 of 1,634 inventorsTop 25%
Massachusetts: #20,532 of 88,656 inventorsTop 25%
Overall (All Time): #779,687 of 4,157,543Top 20%
6 Patents All Time
Xulei Liu has been granted 6 US patents while listed as an inventor at Amazon. The first was granted in 2018 and the most recent in March 2025. Xulei Liu ranks #779,687 of 4,157,543 US inventors in our database (top 18.8%). Patent records list Xulei Liu in Watertown, MA, US.

Patents per Year

Patents granted per year, 2018 to 2025Bar chart with a peak of 1 patents in 2018.peak 12018: 1 patents20182019: 1 patents20192020: 1 patents20202022: 1 patents20222023: 1 patents20232025: 1 patents2025

Issued Patents All Time

Showing 1–6 of 6 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
12249331 Multi-layer keyword detection Christopher Wayne Lockhart, Matthew Joseph Cole 2025-03-11
11646027 Multi-layer keyword detection Christopher Wayne Lockhart, Matthew Joseph Cole 2023-05-09 $390,838,000
11250851 Multi-layer keyword detection Christopher Wayne Lockhart, Matthew Joseph Cole 2022-02-15 $262,460,000
10679625 Multi-layer keyword detection for distributed voice communications Christopher Wayne Lockhart, Matthew Joseph Cole 2020-06-09 $210,601,000
10186265 Multi-layer keyword detection to avoid detection of keywords in output audio Christopher Wayne Lockhart, Matthew Joseph Cole 2019-01-22 $106,811,000
10079015 Multi-layer keyword detection Christopher Wayne Lockhart, Matthew Joseph Cole 2018-09-18 $160,208,000