SN

Shigeyuki NAGATSUMA

Casio Computer Co.: 3 patents #744 of 1,970Top 40%
Overall (All Time): #1,510,460 of 4,157,543Top 40%
3
Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
9430993 Keyboard lid opening and closing apparatus and keyboard instrument — 2016-08-30
7495158 Opening/closing mechanism for a keyboard instrument cover — 2009-02-24
5062342 Piano action device for electronic keyboard musical instruments — 1991-11-05