Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4885136 | Method of anticorrosive treatment for soft water boilers | Sakae Katayama, Toshihiko Mukai, Yoshinari Kawasaki | 1989-12-05 |
| 4881900 | Sensing display apparatus of image pattern | Mikiharu Matsuoka, Yasuhiro Yamada, Yasuko Miyazaki, Takashi Kanemoto, Tamao Ikuta | 1989-11-21 |
| 4831653 | System for registering speech information to make a voice dictionary | — | 1989-05-16 |