Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4424880 | Acoustic device for a head protector | Masato Murayama | 1984-01-10 |
MA
Mitsugi Akita
Overall (All Time): #4,027,694 of 4,157,543Top 100%
1
Patents All Time