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Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
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Daisuke Douyama — 2 Patents

UBUbe: 1 patents #15 of 72Top 25%
UIUbe Industries: 1 patents #895 of 1,686Top 55%
Ube, JP: #358 of 750 inventorsTop 50%
Overall (All Time): #1,709,992 of 4,157,543Top 45%
2 Patents All Time
Daisuke Douyama has been granted 2 US patents while listed as an inventor at Ube. The first was granted in 2021 and the most recent in April 2024. Daisuke Douyama ranks #1,709,992 of 4,157,543 US inventors in our database (top 41.1%). Patent records list Daisuke Douyama in Ube, JP.

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
11951718 Laminate Kazutoshi TSUBOI, Hiroaki Fujii, Takaaki KUSUMOTO 2024-04-09
10933615 Multilayer tubes Kazutoshi TSUBOI, Koji Nakamura, Takaaki KUSUMOTO 2021-03-02