Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4884036 | Band-pass filter | Mikio Koyama | 1989-11-28 |
| 4866767 | Subscriber line interface circuit | Minoru Tanaka, Satoru Yoshida | 1989-09-12 |
| 4803382 | Voltage comparator circuit | Mikio Hayashibara | 1989-02-07 |
| 4800339 | Amplifier circuit | Hisashi Yamada | 1989-01-24 |