Keizo Tatsumi

Yamaha: 3 patents #12 of 178Top 7%

Overall (2019): #81,496 of 560,194Top 15%

Patents 2019

Issued Patents 2019

Showing 1–3 of 3 patents

Patent #	Title	Co-Inventors	Date
D865044	Piano performance controller	—	2019-10-29
D839954	Piano	—	2019-02-05
D837284	Piano	—	2019-01-01