Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7490834 | Board Game | — | 2009-02-17 |
| 7025593 | Teaching circumference instrument | — | 2006-04-11 |
| 6941667 | Teaching sin and cosine instrument | — | 2005-09-13 |
| 6872078 | Teaching cylinder instrument | — | 2005-03-29 |
| D489770 | Game board | — | 2004-05-11 |