Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4866740 | Frequency divider of pulses using ring-counters | — | 1989-09-12 |
| 4851309 | Rechargeable electrochemical apparatus and negative electrode thereof | Yoshinori Toyoguchi, Junichi Yamaura, Tooru Matsui | 1989-07-25 |