Keizo Tatsumi

Yamaha: 4 patents #3 of 119Top 3%

Overall (2018): #41,399 of 503,207Top 9%

Patents 2018

Issued Patents 2018

Showing 1–4 of 4 patents

Patent #	Title	Co-Inventors	Date
D826316	Wind instrument	—	2018-08-21
D823375	Wind instrument	—	2018-07-17
D820901	Mute	—	2018-06-19
D818034	Mute	—	2018-05-15