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| US4214747 | 7 Abr 1978 | 29 Jul 1980 | | Mobile geometrical form | | US4384717 | 12 Nov 1981 | 24 May 1983 | | Mobius strip puzzle | | US5324037 | 24 Jun 1993 | 28 Jun 1994 | | Mobius strip puzzle | | US6250988 | 24 Sep 1999 | 26 Jun 2001 | Martin Fleet | Hand manipulable device | | US6595519 | 30 Nov 1999 | 22 Jul 2003 | | Dimensional puzzle | | US7867115 | 17 Dic 2007 | 11 Ene 2011 | Tangle, Inc. | Segmented ball with lighted elements | | USD576235 | 15 Feb 2008 | 2 Sep 2008 | Tangle Inc. | Football | | USD595516 | 18 Ago 2008 | 7 Jul 2009 | Tangle, Inc. | Chair | | USD614882 | 13 Feb 2009 | 4 May 2010 | Tangle, Inc. | Chair | | USD623247 | 14 Feb 2008 | 7 Sep 2010 | Tangle, Inc. | Baseball |
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