Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
AU

Akira Usui — 1 Patent

UNUnknown: 3 patents #7,366 of 83,584Top 9%
Tsukuba, JP: #1,793 of 2,818 inventorsTop 65%
Overall (All Time): #2,406,284 of 4,157,543Top 60%
1 Patents All Time
Akira Usui has been granted 1 US patent while listed as an inventor at Unknown. All of these patents were granted in 2002. Akira Usui ranks #2,406,284 of 4,157,543 US inventors in our database (top 57.9%). Patent records list Akira Usui in Tsukuba, JP.

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
6350605 Microorganisms, microbial symbionts, their culture methods, and methods for treating manganese-containing water using them Naoki Mita, Yoshishige Kato, Akihiko Maruyama, Takanori Higashihara, Yutaka Kanai +3 more 2002-02-26