Issued Patents 1982
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4313727 | Educational frame device having a rotatable body and rotatable symbol-bearing inserts | — | 1982-02-02 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4313727 | Educational frame device having a rotatable body and rotatable symbol-bearing inserts | — | 1982-02-02 |