Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4841738 | Method and apparatus of automatically switching between cooling and heating modes of an air conditioner | Hikaru Katsuki, Katsumasa Minakawa | 1989-06-27 |
| 4800275 | Heat-developing and transferring apparatus | Sumio Yoshikawa | 1989-01-24 |