Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4817133 | Party selecting circuit arrangement | Ryoichi Takahashi, Isao Ohtawara | 1989-03-28 |
| 4802202 | Telephone call selector | Ryoichi Takahashi, Isao Ohtawara | 1989-01-31 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4817133 | Party selecting circuit arrangement | Ryoichi Takahashi, Isao Ohtawara | 1989-03-28 |
| 4802202 | Telephone call selector | Ryoichi Takahashi, Isao Ohtawara | 1989-01-31 |