Shinji Hamanaga

Yamaha: 3 patents #7 of 184Top 4%

Overall (1997): #11,213 of 185,788Top 7%

Patents 1997

Issued Patents 1997

Showing 1–3 of 3 patents

Patent #	Title	Co-Inventors	Date
D386197	Sound arrester for wind instrument	—	1997-11-11
D386198	Sound arrester for wind instrument	—	1997-11-11
D381037	Sound arrester for wind instrument	—	1997-07-15