Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D303679 | Electronic calculator | Hiroshi Sakaguchi, Toshiya Takahashi | 1989-09-26 |
| D303539 | Electronic calculator | Hiroshi Sakaguchi, Toshiya Takahashi | 1989-09-19 |
| D303121 | Electronic calculator | Hiroshi Sakaguchi, Toshiya Takahashi | 1989-08-29 |