|
| US3956049 | 15 janv. 1974 | 11 mai 1976 | | Continuous business form or the like adapted for subsequent processing into original indicia bearing lottery tickets, envelopes or the like |
| US4407443 | 29 janv. 1979 | 4 oct. 1983 | Ludlow Corporation | Tamper-indicating sheet |
| US4488646 | 3 oct. 1983 | 18 déc. 1984 | Ludlow Corporation | Tamper-indicating sheet |
| US5636874 | 21 juin 1995 | 10 juin 1997 | Micro Format, Inc. | Temperature sensitive security document |
| US6396927 | 23 mars 1998 | 28 mai 2002 | Verify First Technologies, Inc. | Variable density verification |
| US6665406 | 20 avr. 2000 | 16 déc. 2003 | Verify First Technologies, Inc. | Variable density verification |
| US6902387 | 7 déc. 2001 | 7 juin 2005 | Binney & Smith Inc. | Crayon maker |
| US7182902 | 25 avr. 2005 | 27 févr. 2007 | Binney & Smith Inc. | Crayon marker |
| USD471572 | 14 mars 2002 | 11 mars 2003 | Binney & Smith Inc. | Crayon maker |