Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6518988 | Virtual manipulatives | — | 2003-02-11 |
| 5873729 | Mathematical triangle kit and method of use | — | 1999-02-23 |
| 5868577 | Factor blocks kit and method of use | — | 1999-02-09 |
| 5076793 | Fractal mathematics kit | Shahine B. Aghevli | 1991-12-31 |