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| US5261169 | 11 Oct 1991 | 16 Nov 1993 | Advanced Polymer Systems, Inc. | System and method for deodorant delivery in footwear |
| US6006447 | 22 Abr 1999 | 28 Dic 1999 | | Shoe insole with air circulation system |
| US6185844 | 19 Jul 1999 | 13 Feb 2001 | | Disposable absorbent shoe insert |
