Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7018210 | Method and apparatus for teaching and learning reading | Dennis Goldman, Mary Watanabe | 2006-03-28 |
| 6086105 | Book for packaging activity pieces in an activity kit | Lisa Hoffman | 2000-07-11 |
| 5851118 | Digital and analog teaching clock | Yuen Po Man | 1998-12-22 |
| 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 |