Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5119413 | System and method to alter the functions assigned to the keys of a terminal connected to an electronic exchange | Yukiko Okumura | 1992-06-02 |
| 4995070 | Electronic key telephone set with function operation test function and method of controlling the same | — | 1991-02-19 |
| 4947396 | Method and system for detecting data error | Yukiko Okumura | 1990-08-07 |