| http://www.w3.org/ns/prov#value | - BACKGROUND OF THE INVENTION [0001] This invention relates generally to conveyors for moving furniture, appliances, cartons and other household or office equipment up and down staircases and more particularly concerns use of one or more slide sheets to convert a staircase into a ramp for conveying such articles and objects. [0002] Known stair ramps are designed as load bearing structures.
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