Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4877945 | IC card having a function to exclude erroneous recording | — | 1989-10-31 |
| 4868372 | Erroneous-operation preventive apparatus | Masatoshi Oomura, Takahiko Miyata, Tsutomu Shirahase | 1989-09-19 |