Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4885762 | Telephone apparatus | Kazuyuki Umebayashi | 1989-12-05 |
| 4852147 | Telephone apparatus | Kazuyuki Umebayashi | 1989-07-25 |
| 4847887 | Telephone system in a vehicle | Kazuyuki Umebayashi | 1989-07-11 |
| 4801974 | Safety device for fixing heater | Toshihiko Suto | 1989-01-31 |