Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4850924 | Low-profile rolling book for children | Andrew S. Mayer | 1989-07-25 |
| 4844476 | Video target response apparatus and method employing a standard video tape player and television receiver | — | 1989-07-04 |