Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4885766 | Remote control device using a telephone line | Norio Yasuoka, Takehiro Kobayashi, Yasuyuki Hatakeyama, Yoshiyuki Aoto, Jiro Itogawa | 1989-12-05 |
| 4847899 | Power circuit for telephone accessory devices | — | 1989-07-11 |