Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7534106 | Kinesthetic number line | David S. Dutcher | 2009-05-19 |
| 6041507 | Multiple line drawing aid | David S. Dutcher | 2000-03-28 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7534106 | Kinesthetic number line | David S. Dutcher | 2009-05-19 |
| 6041507 | Multiple line drawing aid | David S. Dutcher | 2000-03-28 |