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Referenced by

Citing PatentFiling dateIssue dateOriginal AssigneeTitle
US395581420 Feb 197511 May 1976Balancing toy with ends of sockets and protrusions
US399410210 Sep 197530 Nov 1976Alley FriendsInflatable element and system
US407879325 Jul 197514 Mar 1978Portable apparatus for delineating a playing area
US43098516 Aug 197912 Jan 1982Structure of inflatable tubes with closed loop connectors
US43522554 Dec 19805 Oct 1982Group use toy structural construction set
US475819627 Mar 198719 Jul 1988Block unit for making three-dimensional blocks composed of geometric points, lines and planes
US505629119 Oct 198915 Oct 1991Skilland Engineering, Ltd.Modular system for space frame structures
US515223020 Jun 19836 Oct 1992Joining means for securing articles together
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US550349719 Sep 19942 Apr 1996OP-D-OP, Inc.Ratchet link
US558248823 Jan 199610 Dec 1996OP-D-OP, Inc.Ratchet link
US570418623 Jan 19966 Jan 1998Tiltan 3 Dimensional Technologies Ltd.Construction element
US589741711 Dec 199627 Apr 1999Primordial, LLCConstruction system
US66659937 May 200223 Dec 2003Sorensen Research and Development TrustInterlockable element for structure assembly set
US667293114 Nov 20006 Jan 2004Interconnectable model construction elements
US692577019 Dec 20039 Aug 2005Sorensen Research and Development TrustInterlockable element for structure assembly set
US69489989 Feb 200427 Sep 2005Interconnectable model construction elements
US71400815 Feb 200328 Nov 2006General Motors CorporationReleasable fastener system
US73711469 Feb 200513 May 2008Toy construction set method and apparatus
US747266619 Jun 20076 Jan 2009Support frame for tarpaulin used for sheltering boats and other objects
US766955126 Jan 20072 Mar 2010Worldwise, Inc.Pet activity system
USD30777529 Nov 19888 May 1990Interlego A.G.Toy construction element
USD31747515 Aug 198911 Jun 1991Interlego A.G.Toy construction element
USD31795515 Aug 19892 Jul 1991Interlego A.G.Toy construction element
USD64388329 Jul 201023 Aug 2011Lego A/SElement for a toy construction set