Issued Patents 1989
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4887234 | Portable electronic device with plural memory areas | — | 1989-12-12 |
| 4845717 | IC card having two output buffers | — | 1989-07-04 |
| 4841131 | Portable electronic device with means for checking data validity during read-out | — | 1989-06-20 |
| 4839792 | Portable electronic apparatus with a device for determining data validity | — | 1989-06-13 |
| 4833595 | Portable electronic apparatus with data remaining counter | — | 1989-05-23 |
| 4827512 | Programmable portable electronic device | Katsuhisa Hirokawa | 1989-05-02 |
| 4800520 | Portable electronic device with garbage collection function | — | 1989-01-24 |