Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4870690 | Audio signal transmission system | Masao Hosaka | 1989-09-26 |
HN
Hirokazu Negishi
Overall (1989): #104,559 of 140,708Top 75%
1
Patents 1989