Katsutoki Hanayama

Yamaha: 2 patents #22 of 158Top 15%

Overall (2021): #143,563 of 548,734Top 30%

Patents 2021

Issued Patents 2021

Showing 1–2 of 2 patents

Patent #	Title	Co-Inventors	Date
10972818	Mounting tool and speaker device	—	2021-04-06
10924831	Speaker device	—	2021-02-16