Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D301578 | Telephone handset | Yoshio Sasaki, Hiroshi Ishizuka, Iwamasa Nishikado | 1989-06-13 |
| D301031 | Key telephone set | Yoshio Sasaki, Hiroyoshi Sato, Iwamasa Nishikado | 1989-05-09 |