Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8360780 | Method and system for creating a multiplication and division puzzle | — | 2013-01-29 |
| D528865 | Combined tray and coaster set | — | 2006-09-26 |
| 4436324 | Bridge bidding aid | — | 1984-03-13 |
| 4340947 | Dual timing apparatus | — | 1982-07-20 |
| 4238846 | Timing device | — | 1980-12-09 |
| 4236242 | Dual timer device | — | 1980-11-25 |