Issued Patents 1997
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D379315 | Educational balance | Eric Toriumi, Lonnie C. Pogue, Brian Macowski | 1997-05-20 |
| D377949 | Digital/analog teaching clock | Jane Woldenberg, Tirza Ernst, Barbara Plain | 1997-02-11 |
| 5597308 | Assembly including interlocking components for teaching mathematical concepts | Lisa Hoffman | 1997-01-28 |