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| Number | Title | Issue Date |
| 7104361 | Ladder A platform ladder comprising two elongate ladder sections having feet at one end and an upper end, the upper end of each section being hinged to an upper rail, a platform pivotally secured to one ladder section below the upper end and adapted to interconnect with th... | 09/12/2006 |
| 7013518 | Collapsible loading ramp A collapsible loading ramp affixable to a raised surface in a non-permanent manner extending from the raised surface to the ground. The ramp is foldable by way of a hinge connecting the first ramp section to the lower ramp section. Rung units attach to the first and... | 03/21/2006 |
| 6994184 | Stowable ladder configured for installation in an opening A folding ladder is configured for installation in an opening to provide access between one floor or space and another floor or space. The folding ladder includes, in one aspect, an upper ladder section having a left ladder rail and a right ladder rail, a lower ladd... | 02/07/2006 |
| 6951265 | Foldable stairway ladder A foldable stairway ladder for use in accessing items includes a structure that can be conveniently folded to reduce the amount of space taken up by ladder when not in use. The ladder consists of a stairway section connected to a platform, in turn rotatably connecte... | 10/04/2005 |
| 6945360 | Modular ladder assembly A modular ladder assembly includes at least two ladder assemblies, each assembly having first and second parallel stiles and a plurality of spaced apart rungs disposed between the first and second stiles, the plurality of rungs being perpendicular to said first and ... | 09/20/2005 |
| 6902036 | Stabilizer for folding step ladders A ladder is equipped with a stabilizing device. The stabilizing device resists movements of the ladder's feet which would occur in response to movements of a ladder's user while on the ladder. The stabilizing device holds the ladder's feet and provides transverse an... | 06/07/2005 |
| 6803933 | Systems and methods for dot gain determination and dot gain based printing The present invention generally provides methods and systems for printing. A statistical learning system is used to determine dot gain. ... | 10/12/2004 |
| 6719094 | Limited mobility ladder A ladder for people with limited mobility comprising a first frame member defining a first sidewall; a second frame member defining a second sidewall; a plurality of steps spanning between the first and second sidewalls, from a first level above the surface to the u... | 04/13/2004 |
| 6571915 | Limited mobility ladder A ladder for people with limited mobility comprising a first frame member defining a first sidewall; a second frame member defining a second sidewall; a plurality of steps spanning between the first and second sidewalls, from a first level above the surfa... | 06/03/2003 |
| 6450290 | Folding ladder A lightweight, folding ladder having steps that fold together and lie flat within the frame, when the legs of the frame are collapsed into a fold-away position. The steps each have an edge recess that allows a person climbing the ladder to laterally draw ... | 09/17/2002 |
| 6318498 | Collapsible ladder A collapsible ladder provides a plurality of segments, each segment associated with one rung of the ladder. The segments may be folded into a flat or planar configuration, after which each segment may be folded against adjacent segments, thereby forming a... | 11/20/2001 |
| 6129179 | Laterally extensible ladder A laterally extensible ladder comprises first and second uprights having a plurality of adjacent rung assemblies mounted therebetween. Each rung assembly includes a first hollow rung element that defines a rung axis and a second rung element received in t... | 10/10/2000 |
| 6105719 | User-configurable mechanics stool A highly mobile support cart for automotive service personnel presents an elevated support platform over the engine compartment of a vehicle undergoing service. The wheeled frame, ideally supported by a smooth, concrete surface, comprises a rigid, transve... | 08/22/2000 |
| 6079072 | Foldable and rigidizable space spanning structure A frame assembly supports a work surface of either flexible material or of sections of foldable and unfoldable relatively rigid material all so that the frame assembly and material may either be unfoldable and rigidized or folded into a compact package. T... | 06/27/2000 |
| 6012548 | Ladder frame A ladder has a first frame member and a second frame member. The second frame member folds to a position within the confines of the first frame member to provide a thin, easily stored ladder for use within a household. The step of the is provided with one... | 01/11/2000 |
| 5890330 | Adjustable staircase Adjustable steps (2) extend between two parallel stingboards (3). Each stringboard (3) includes two locking flanges (4) and each step (2) is supported by four pivotable blocks (7, 8) each securable to a flange (4) by means of a nut (17). Two threaded rods... | 04/06/1999 |
| 5775461 | Link ladder system A ladder system comprising a plurality of ladder segments arranged in seriatim. Each segment includes two sections joined by a hinge such that a portion of the segment may engage an object to be scaled. A retaining device is provided on each segment to ma... | 07/07/1998 |
| 5757650 | Method of correcting stock condition in an automated storehouse control and apparatus therefor, and method of correcting conveyance state of parts and apparatus therefor The disclosed is a method comprising the steps of displaying entirely a plurality of storehouse facilities in the form of a plan view; informing a storage abnormality when the actual storage location and stock condition are different from that displayed i... | 05/26/1998 |
| 5605203 | Automatic foldable emergency ladder system An automatic foldable emergency ladder system for use in a building having a smoke detecting device includes an inverted L-shaped housing having a horizontal portion and a vertical portion and being securely mounted to a perimeter wall of a roof of the bu... | 02/25/1997 |
| 5582268 | Safety platform The present invention relates to a safety platform having a large platform with a high friction surface. Surrounding and supporting the platform are four legs. Located at the upper ends of the legs are two lateral guard rails and a front guard rail. The r... | 12/10/1996 |
| 5370204 | Collapsible ladder for automotive painting A collapsible ladder assembly (10) is provided which is particularly adapted for use in and around automobiles in order to provide convenient access to the upper portions of the vehicle for painting or other purposes. The ladder assembly (10) includes a g... | 12/06/1994 |
| 5195610 | Bidirectionally foldable step ladder A step ladder which folds with respect to a width and a depth thereof. A set of unidirectionally foldable steps is pivotally attached between a pair of side rails, and an extendible cross-bracing assembly is disposed between another pair of side rails. Fo... | 03/23/1993 |
| 5170862 | Locking device for bidirectionally foldable step ladders A locking device for preventing bidirectionally foldable step ladders from folding when in an unfolded position, the step ladders being the type including two pairs of U-shaped side rails and a plurality of foldable steps linked by braces to a plate slida... | 12/15/1992 |
| 5158151 | Bidirectionally foldable step ladder A step ladder which folds with respect to a width and a depth thereof. Two sets of unidirectionally foldable steps are pivotally attached between two pairs of side rails, and foldable spreaders are pivotally attached between opposing side rails. Each step... | 10/27/1992 |
| 5131492 | Portable lightweight collapsible footstool with means for detachably mountable A collapsible folding step-stool which is mountable to a cabinet door. The step stool comprises (1) a bracket mountable to the cabinet door; (2) a platform movable between a lowered, generally horizontal, operative position and a raised, generally vertica... | 07/21/1992 |
| 5064243 | Apparatus and method for use in hospitals to promote patient-caregiver contact The present invention provides an apparatus and method to facilitate direct eye level contact between a hospital caregiver or other support personnel and a patient confined to a bed. The invention provides a lightweight yet stable chair which rapidly fold... | 11/12/1991 |
| 5040635 | Multisection pole ladder Tree pole ladder which includes first and second detachable sections. Each of the detachable sections pivotally supports laterally extending steps which the foldable from a horizontally extending position for climbing, to a storage position aligned with t... | 08/20/1991 |
| 5024293 | Emergency ladder equipment The present invention discloses an emergency ladder equipment. Such an emergency ladder equimpment is mounted on the outside wall of the top floor of buildings. The emergency ladder equipment substantially comprises a number of ladder members which are st... | 06/18/1991 |
| 4959935 | Adjustable stairway A prefabricated adjustable stairway having a pair of opposed stacked stringers supporting each step. A stair support bracket is pivotally attached to each top stringer and is connected by an associated link to the supporting bottom stringer. Each step is ... | 10/02/1990 |
| 4924970 | Ladder apparatus A ladder apparatus adapted to be borne by a fixture, such as cabinet, including a bracket adapted to be mounted on the fixture, a pair of first support members individually, substantially pivotally mounted on the bracket, a pair of second support members ... | 05/15/1990 |
| 4805736 | Disappearing ladder A ladder includes a pair of spaced apart rails having upper and lower ends, and a plurality of substantially identical slats located between the rails. Each slat has a support axle or the like engaging the rails, and defining an axis of rotation for the s... | 02/21/1989 |
| 4787477 | Stand for all terrain vehicle A hunting stand for an all terrain vehicle is characterized by a collapsible frame connected with the vehicle and including front and rear pairs of legs formed of hinged upper and lower sections pivotal between folded and extended positions. A locking sle... | 11/29/1988 |
| 4711282 | Portable and collapsible stair A portable and collapsible stair which provides support platforms that are spaced laterally and vertically from one another at approximately a one-to-one slope, thus enabling a person to ascend or descend the stair in a more convenient walking motion. The... | 12/08/1987 |
| 4637575 | Helicopter airmobile work platform for working on power lines and tower structures A work platform and helicopter assembly for working on a high-voltage power line such as an EHV power line. A work platform comprising a rectangular base of electrically conductive material is disposed transversely across a pair of helicopter skid tubes t... | 01/20/1987 |
| 4520896 | Foldable ladder A ladder including a lower step section and a strut pivotally connected together at their upper ends for swinging movement between a collapsed position toward each other and a downwardly divergent erected position, an upper step section pivoted to the upp... | 06/04/1985 |
| 4483415 | Folding stepladder A ladder including a lower step section and a strut pivotally connected at their upper ends for swinging movement between a collapsed position one within the other and a downwardly divergent erected position, and an upper section pivoted to the upper end ... | 11/20/1984 |
| 4421206 | Ladder In a stepladder, with two legs which are connected with each other swingably around an axis in the region of an upper end of the legs, at least one of the legs has transverse support members which are supported by a first pair of stiles, and arranged spac... | 12/20/1983 |
| 4378862 | Portable spiral staircase A self-supporting helical staircase having an interconnected series of radial steps adapted to be swingably opened for providing vertically spaced horizontal support surfaces. The steps are angularly displaceable about a pintel post in progressive increme... | 04/05/1983 |
| 4258828 | Folding mast ladder A folding ladder entirely contained within a U-shaped channel is mounted in a sailboat mast and can be folded and stowed in a flush position, avoiding protruding surfaces on the circumference of the mast. A sliding bar is contained within the U-shaped cha... | 03/31/1981 |
| 4246981 | Portable observation stand A portable observation stand having a ladder formed of upper and lower ladder sections pivotally interconnected at adjacent ends for movement between a folded position and an extended position in end-to-end relation, a seat and a foot-support member are b... | 01/27/1981 |
