Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4866667 | Switching device for a plurality of RS232C interfaces | — | 1989-09-12 |
| 4847799 | Keyboard apparatus having separate working areas with thumb-operated shifting of key functions | Masasuke Morita, Toshiro Kitazaki | 1989-07-11 |