Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
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Hiroaki Takayanagi — 1 Patent

UNUnknown: 2 patents #12,644 of 83,584Top 20%
PIPola Chemical Industries: 1 patents #95 of 199Top 50%
Saitama, JP: #6,779 of 10,685 inventorsTop 65%
Overall (All Time): #2,406,284 of 4,157,543Top 60%
1 Patents All Time
Hiroaki Takayanagi has been granted 1 US patent while listed as an inventor at Unknown. All of these patents were granted in 2005. Hiroaki Takayanagi ranks #2,406,284 of 4,157,543 US inventors in our database (top 57.9%). Patent records list Hiroaki Takayanagi in Saitama, JP.

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
6881841 Dibenzosuberanyl piperazine derivatives and drug-resistance overcoming agents containing the derivatives Tsutomu Takeuchi, Seiki Kobayashi, Yumiko Osa, Yumiko Suzuki, Yoko Sato +2 more 2005-04-19