Issued Patents 1982
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4353432 | Electro-dynamic speaker | Mitsuhiro Hasegawa, Hiroshi Yamamoto | 1982-10-12 |
HT
Hiroyuki Takewa
Overall (1982): #58,323 of 81,411Top 75%
1
Patents 1982