PATENTED
| Date | Clue |
|---|---|
| 2013-07-26 | Uncopiable, say |
| 2004-12-26 | Unduplicatable, in a way |
| 2001-07-12 | Protected, in a way |
| 1998-03-01 | Protected, in a way |
| Date | Clue |
|---|---|
| 2013-07-26 | Uncopiable, say |
| 2004-12-26 | Unduplicatable, in a way |
| 2001-07-12 | Protected, in a way |
| 1998-03-01 | Protected, in a way |