Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
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Duane Douglas Ewing — 1 Patent

AGAgraquest: 1 patents #15 of 21Top 75%
Woodland, CA: #116 of 206 inventorsTop 60%
California: #249,524 of 386,348 inventorsTop 65%
Overall (All Time): #2,406,284 of 4,157,543Top 60%
1 Patents All Time
Duane Douglas Ewing has been granted 1 US patent while listed as an inventor at Agraquest. All of these patents were granted in 1997. Duane Douglas Ewing ranks #2,406,284 of 4,157,543 US inventors in our database (top 57.9%). Patent records list Duane Douglas Ewing in Woodland, CA, US.

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
5691191 Medium for the cultivation of lagenidium giganteum Sherry Darlene Heins, Pamela Marrone 1997-11-25