Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4862309 | Protection circuit for battery feed circuit | Toshiro Tojo, Kenji Takato, Kazumi Kinoshita | 1989-08-29 |
| 4827503 | Integrated ringing circuit and a ring trip circuit for the same | Kenji Takato, Kazumi Kinoshita, Toshiro Tojo | 1989-05-02 |
| 4797183 | Electroplated composite of zinc and organic polymer | Hiroyuki Nagamori, Kozo Kitazawa | 1989-01-10 |