Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4877733 | Glucose dehydrogenase and its production | Shigeyuki Imamura, Masaki Takada | 1989-10-31 |
| D304192 | Radio pager | Sigeki Hayasaka | 1989-10-24 |
| D303669 | Display pager | Shigeki Hayasaka | 1989-09-26 |