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| US4274430 | 15 Ago 1979 | 23 Jun 1981 | | Walking cane apparatus | | US4765355 | 26 Sep 1986 | 23 Ago 1988 | | Wheeled walking device | | US4867438 | 22 Mar 1989 | 19 Sep 1989 | | Light weight walker | | US5013032 | 14 Oct 1988 | 7 May 1991 | | Child walker-trainer | | US5810697 | 30 Abr 1997 | 22 Sep 1998 | | Push cart for resistance exercise | | US8079379 | 27 Mar 2008 | 20 Dic 2011 | | Baby walking apparatus having a double winding shape and two pairs of handlebars paralled to a wheel axle | | USD355629 | 9 Jul 1993 | 21 Feb 1995 | | Baby walking aid | | USD358791 | 4 Feb 1994 | 30 May 1995 | The Little Tikes Company | Walker for young child | | USD443233 | 26 Mar 1998 | 5 Jun 2001 | The First Years Inc. | Walker |
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