RI

Ryuichi Izumi

Yamaha: 8 patents #321 of 2,001Top 20%
Overall (All Time): #619,112 of 4,157,543Top 15%
8
Patents All Time

Issued Patents All Time

Showing 1–8 of 8 patents

Patent #TitleCo-InventorsDate
11599135 Rotation operation device Yoshihiro Suzuki 2023-03-07
9761391 Rotary knob 2017-09-12
8562162 Display device and manipulation device with light display Yoshihiro Natsume 2013-10-22
8498437 Panel opening and closing structure of electric operation apparatus Takeshi Ando 2013-07-30
8213642 Slide manipulation device and slide control console Yoshihiro Natsume 2012-07-03
7875819 Panel operator structure for electronic equipment 2011-01-25
7396994 Electronic keyboard instrument 2008-07-08
7078611 Keyboard instrument Kei Kunisada, Takashi Fujita 2006-07-18