Issued Patents 1982
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4354842 | System for utilizing interactive blocks to teach arithmetic | Deborah Stoddard, Donald Gorgas | 1982-10-19 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4354842 | System for utilizing interactive blocks to teach arithmetic | Deborah Stoddard, Donald Gorgas | 1982-10-19 |