Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5967787 | Educational display with a clock and with numeral and date blocks accompanied by a base 10 mathematical apparatus | — | 1999-10-19 |
| D398645 | Teaching tool | — | 1998-09-22 |
| 5738524 | Multi-function teaching game box | — | 1998-04-14 |
| 5683252 | Multi-functional game and learning device | — | 1997-11-04 |