Issued Patents 1989
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D303980 | Electronic calculator | Hiroshi Sakaguchi, Toshiya Takahashi | 1989-10-10 |
| D303807 | Electronic calculator with memo | Hiroshi Sakaguchi, Toshiya Takahashi | 1989-10-03 |
| D303677 | Electronic calculator | Hiroshi Sakaguchi, Noriko Satake | 1989-09-26 |
| D303678 | Electronic calculator | Hiroshi Sakaguchi, Masaki Kawamura | 1989-09-26 |
| D303680 | Electronic calculator | Hiroshi Sakaguchi, Mieko Harada | 1989-09-26 |
| D299700 | Electronic thermometer | Hiroshi Sakaguchi, Masaki Kawamura | 1989-02-07 |