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| US4566627 | 2 Abr 1985 | 28 Ene 1986 | Westvaco Corporation | Tamper detection envelope |
| US4709396 | 24 Dic 1985 | 24 Nov 1987 | John H. Harland Company | Tamper-evident envelope with indicia underlying cohesive layers |
| US4709397 | 16 May 1986 | 24 Nov 1987 | John H. Harland Company | Tamper-evident envelope with indicia-forming cohesive layers |
| US6983875 | 23 Feb 2004 | 10 Ene 2006 | | Apparatus for fastening and separating containers |
| US7172107 | 18 Abr 2003 | 6 Feb 2007 | Tension Envelope Corporation | Envelope having improved overlap profile |
| US7371008 | 23 Jul 2004 | 13 May 2008 | Kraft Foods Holdings, Inc. | Tamper-indicating resealable closure |
| US7744517 | 12 May 2008 | 29 Jun 2010 | Kraft Foods Global Brands LLC | Tamper-indicating resealable closure |
| US7963413 | 23 May 2006 | 21 Jun 2011 | Kraft Foods Global Brands LLC | Tamper evident resealable closure |
| US8020751 | 10 Ago 2007 | 20 Sep 2011 | | Apparatus for fastening and/or separating container portions |
| US8114451 | 27 Dic 2006 | 14 Feb 2012 | Kraft Foods Global Brands LLC | Resealable closure with package integrity feature |
