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Patentes

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Patente citante Fecha de presentación Fecha de emisión Cesionario original Título
US48023203 Nov 19877 Feb 1989Keystone Retaining Wall Systems, Inc.Retaining wall block
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US547440515 Oct 199312 Dic 1995Societe Civile des Brevets Henri C. VidalLow elevation wall construction
US548762318 Ago 199330 Ene 1996Societe Civile des Brevets Henri C. VidalModular block retaining wall construction and components
US549036313 Oct 199413 Feb 1996Anchor Wall Sytems, Inc.Composite masonry block
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US55891246 Jun 199531 Dic 1996Block Systems, Inc.Method of forming composite masonry blocks
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US570418323 May 19956 Ene 1998Anchor Wall Systems, Inc.Composite masonry block
US570906215 Jul 199620 Ene 1998Anchor Wall Systems, Inc.Composite masonry block
US57111294 May 199527 Ene 1998Anchor Wall Systems, Inc.Masonry block
US57951057 Jun 199518 Ago 1998Anchor Wall Systems, Inc.Composite masonry block
US579770628 Jun 199625 Ago 1998Societe Civile des Brevets Henri VidalEarth structures
US58270152 Sep 199727 Oct 1998Anchor Wall Systems, Inc.Composite masonry block
US58796038 Nov 19969 Mar 1999Anchor Wall Systems, Inc.Process for producing masonry block with roughened surface
US602994328 Feb 199729 Feb 2000Anchor Wall Systems, Inc.Splitting technique
US61133187 Ago 19985 Sep 2000Anchor Wall Systems, Inc.Composite masonry block
US614271325 Sep 19987 Nov 2000Anchor Wall Systems, Inc.Composite masonry block
US61787041 Jul 199930 Ene 2001Anchor Wall Systems, Inc.Splitting technique
US61831683 Feb 20006 Feb 2001Anchor Wall Systems, Inc.Composite masonry block
US631219718 Sep 20006 Nov 2001Anchor Wall Systems, Inc.Composite masonry block
US661638217 Sep 20019 Sep 2003Anchor Wall Systems, Inc.Composite masonry block
US704847211 Jun 200323 May 2006Anchor Wall Systems, Inc.Composite masonry block
US73609708 Dic 200522 Abr 2008Anchor Wall Systems, Inc.Composite masonry block
US73842155 Ago 200310 Jun 2008Anchor Wall Systems, Inc.Composite masonry block
US782336024 May 20072 Nov 2010Open core building blocks system
USD29578811 Feb 198717 May 1988Keystone Retaining Wall Systems, Inc.Wall block
USD2957901 Oct 198617 May 1988Keystone Retaining Wall Systems, Inc.Starter wall block
USD29600727 May 198631 May 1988Keystone Retaining Wall Systems, Inc.Wall block
USD29636518 Sep 198621 Jun 1988Keystone Retaining Wall Systems, Inc.Construction block
USD2975742 Jun 19866 Sep 1988Keystone Retaining Wall Systems, Inc.Wall block
USD2984638 Jun 19878 Nov 1988Keystone Retaining Wall Systems, Inc.Retaining wall block
USD3002536 Jun 198814 Mar 1989Keystone Retaining Wall Systems, Inc.Retaining wall block
USD3002546 Jun 198814 Mar 1989Keystone Retaining Wall Systems, Inc.Retaining wall block
USD30106414 May 19869 May 1989Keystone Retaining Wall Systems, Inc.Convex block
USD3114448 Nov 198516 Oct 1990Wall block
USD31690421 Nov 198814 May 1991Convex block
USD31704821 Nov 198821 May 1991Keystone Retaining Wall Systems, Inc.Wall block
USD3172095 Dic 198828 May 1991Corner wall block
USD38056021 May 19921 Jul 1997Keystone Retaining Wall Systems, Inc.Three faceted broken front face of a retaining wall block
USD44551227 Oct 199724 Jul 2001Anchor Wall Systems, Inc.Retaining wall block
USD4586938 Nov 199611 Jun 2002Anchor Wall Systems, Inc.Retaining wall block
USRE343146 Feb 199120 Jul 1993Keystone Retaining Wall Systems, Inc.Block wall
USRE3727811 Jun 199317 Jul 2001Keystone Retaining Wall SystemsRetaining wall block