HS

Hiroto Sakuma

NC Nippon Columbia Co.: 1 patents #15 of 66Top 25%
📍 Shirakawa, JP: #49 of 93 inventorsTop 55%
Overall (All Time): #2,258,748 of 4,157,543Top 55%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
5731923 Medium recording apparatus and medium reproducing apparatus, and medium recording method and medium reproducing method, and medium used therefor — 1998-03-24
5634031 Optical disk system having table-of-contents information data — 1997-05-27