Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D531669 | Educational device | Gayle E. Gordon | 2006-11-07 |
| 6532314 | Talking toy scanner | Barbara Plain, Samuel Nguy | 2003-03-11 |
| D400813 | Teaching scale | Eric Toriumi | 1998-11-10 |
| D377949 | Digital/analog teaching clock | Richard Woldenberg, Jane Woldenberg, Barbara Plain | 1997-02-11 |