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Patente citante Fecha de presentación Fecha de emisión Cesionario original Título
US459749814 Dic 19841 Jul 1986East/West Industries, Inc.Mobile maintenance stand and crane apparatus
US473074229 Dic 198615 Mar 1988Core Industries, Inc.Apparatus for lifting an elongate member
US478907220 Abr 19876 Dic 1988Hydraulic manhole cover lifter
US493465913 Mar 198919 Jun 1990Hoist and dolly apparatus
US50167682 Nov 198921 May 1991David C. Kennard, Jr.
James C. Kennard
Pickup truck derrick with traveling sheaves
US50353367 Feb 199030 Jul 1991Compact collapsible manhole cover lifter
US50640784 Feb 199112 Nov 1991Combination portable hoist, crane, and vehicle towing apparatus
US507644824 Ago 199031 Dic 1991Hein-Werner CorporationPortable hydraulic crane
US51882474 Nov 199123 Feb 1993Lifting apparatus
US53483246 Oct 199220 Sep 1994Electronic Voting Systems, Inc.Transportable component stand
US542365228 Jun 199413 Jun 1995Grave marker lifting and setting device
US575878517 Jun 19962 Jun 1998Lifting system
US579750416 Jun 199725 Ago 1998Portable hoisting system
US591886115 Jul 19976 Jul 1999Load lifting apparatus
US593449020 Ene 199510 Ago 1999Combination engine hoist and stand
US60301706 Abr 199829 Feb 2000Hydraulic lift boom attachable to a tractor's draw bar and three point hitch
US62134811 Jul 199910 Abr 2001ALMAssembly consisting of a support structure and of a trolley for transporting equipment
US628669511 Abr 200011 Sep 2001Killick Industries LLCEngine lifting and positioning assembly
US68992384 Oct 200231 May 2005D B Industries, Inc.Methods and apparatus for supporting a davit arm
US694574220 Jun 200220 Sep 2005Portable manhole cover remover
US698372113 Abr 200410 Ene 2006Hydropac/Lab Products, Inc.Method and system of providing sealed bags of fluid at the clean side of a laboratory facility
US73710396 Abr 200513 May 2008Slat replacement system
US737774130 Nov 200527 May 2008Articulating loader with twin control arms, and methods of constructing and utilizing same
US76778618 Jun 200516 Mar 2010Slat replacement machine
US787852430 Mar 20091 Feb 2011Gooseneck trailer hitch convertible to a lifting boom
US798757029 Jun 20092 Ago 2011Adjustable apparatus for removing wires from underground conduit
US82406839 Ene 200814 Ago 2012Portable hand truck with powered lifting device