Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6820744 | Skin care product delivery system | — | 2004-11-23 |
| 6086105 | Book for packaging activity pieces in an activity kit | Richard Woldenberg | 2000-07-11 |
| 5597308 | Assembly including interlocking components for teaching mathematical concepts | Richard Woldenberg | 1997-01-28 |