Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4859152 | Electromagnetic air pump | Yoshie Watari, Satoshi Makayama | 1989-08-22 |
| 4825486 | Bedsore-preventing air mattress controller | Yoshie Watari, Satoshi Nakayama, Haruhiko Naruse | 1989-05-02 |