Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4888654 | Method of writing and reading digital data interspersed with analog audio frequency data on magnetic recording tape | — | 1989-12-19 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4888654 | Method of writing and reading digital data interspersed with analog audio frequency data on magnetic recording tape | — | 1989-12-19 |