Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6200170 | Tower building-block biased latching system | Mark F. Amberg, Benjamin Young | 2001-03-13 |
| 6126492 | Tower building block biased latching system | Mark F. Amberg, Benjamin Young | 2000-10-03 |