Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
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Li Qinxiu — 2 Patents

Amazon: 2 patents #7,232 of 19,158Top 40%
Wharton, TX: #13 of 37 inventorsTop 40%
Texas: #52,941 of 125,132 inventorsTop 45%
Overall (All Time): #1,709,992 of 4,157,543Top 45%
2 Patents All Time
Li Qinxiu has been granted 2 US patents while listed as an inventor at Amazon. The first was granted in 1992 and the most recent in April 1994. Li Qinxiu ranks #1,709,992 of 4,157,543 US inventors in our database (top 41.1%). Patent records list Li Qinxiu in Wharton, TX, US.

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
5304722 Hybrid rice production utilizing perennial male sterile rice plants Alfonso G. Calub 1994-04-19 $14,049,000
5158879 Hybrid rice production utilizing perennial male sterile rice plants Alfonso G. Calub 1992-10-27 $36,684,000