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Class Information
Number: 182/157
Name: Fire escape, ladder, or scaffold > Unitary foldable, rigid scaffold or ladder > Collapsible ladder > Lazy tong type
Description: Device comprising lazy tong construction.










Sub-classes under this class:

Class Number Class Name Patents
182/158 Mechanical or power-extending means 1


Patents under this class:

Patent Number Title Of Patent Date Issued
6802393 Foldable ladder Oct. 12, 2004
5725069 Extendable pyramid ladder system Mar. 10, 1998
4733752 Extensible ladder for boats Mar. 29, 1988
4571144 Tailgate ramp for attaching to the tailgate of a truck Feb. 18, 1986
4527941 Expandable support structure usable as loading ramp Jul. 9, 1985
4076102 Trap door and folding ladder arrangement Feb. 28, 1978











 
 
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