Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5189646 | Small-sized electronic device with depth gauge | Yukitoshi Sako, Sayuri Ohta | 1993-02-23 |
| 5031160 | Small-sized electronic device with depth gauge | Sayuri Koizumi, Yukitoshi Sako | 1991-07-09 |