|
| US3951084 | 20 Sep 1974 | 20 Abr 1976 | Cookson Sheet Metal Developments Limited | Manufacture of a frangible element in sheet material |
| US3952900 | 6 Dic 1974 | 27 Abr 1976 | | Packing container intended in particular for pressurized contents |
| US5121851 | 29 Oct 1990 | 16 Jun 1992 | Aluminum Company of America | Resealable container closure |
| US7055713 | 12 Nov 2002 | 6 Jun 2006 | Sonoco Development, Inc. | Easy-opening closure for retortable container |
| USRE28776 | 7 Oct 1974 | 20 Abr 1976 | Cookson Sheet Metal Developments Limited | Frangible elements in sheet material |
