Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4859917 | Speed control device for an electric sewing machine | Michio Hisatake | 1989-08-22 |
| 4857469 | Process for preparing optically active mercapto compound | Fumihiro Ishimura, Seiji Akiyama | 1989-08-15 |