Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4873723 | Method and apparatus for multi-pulse speech coding | Kouichi Shibagaki | 1989-10-10 |
| 4797931 | Audio frequency signal identification apparatus | Yasuo Furukawa, Katsuyuki Yamazaki, Takemi Hosaka | 1989-01-10 |