Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D501895 | Structural alignment puzzle | Matthew F. Lennon | 2005-02-15 |
| D465534 | Paradoxical structural puzzle | Matthew F. Lennon | 2002-11-12 |
| D464681 | Structural alignment puzzle | Matthew F. Lennon | 2002-10-22 |
| D397378 | Mirror image geometric puzzle | Matthew F. Lennon | 1998-08-25 |
| D375329 | Geometric structural puzzle | Matthew F. Lennon | 1996-11-05 |