Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
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Keitaro So — 1 Patent

NINipro: 1 patents #207 of 473Top 45%
Oshima, JP: #669 of 1,090 inventorsTop 65%
Overall (All Time): #2,406,284 of 4,157,543Top 60%
1 Patents All Time
Keitaro So has been granted 1 US patent while listed as an inventor at Nipro. All of these patents were granted in 2008. Keitaro So ranks #2,406,284 of 4,157,543 US inventors in our database (top 57.9%). Patent records list Keitaro So in Oshima, JP.

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
7417118 Pharmaceutical composition containing artificial oxygen carrier Toshiya Kai, Naohisa Katayama, Yuko Azuma, Junichi Yokoe, Yoshinori Kida +6 more 2008-08-26