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USPTO Patent Rankings Data through Dec 31, 2025
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Hajime Ito — 2 Patents in 2021

NCNippon Chemical Industrial Co.: 2 patents #3 of 18Top 20%
Overall (2021): #158,667 of 548,734Top 30%
2 Patents 2021

Issued Patents 2021

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
11084835 2,3-bisphosphinopyrazine derivative, method for producing same, transition metal complex, asymmetric catalyst, and method for producing organic boron compound Hiroaki Iwamoto, Tsuneo Imamoto, Ken Tamura, Natsuhiro Sano 2021-08-10
11053265 Optically active substituted 2,3-bisphosphinoquinoxalines and processes for producing the same Hiroaki Iwamoto, Tsuneo Imamoto, Ken Tamura 2021-07-06