Quick assembly tent

Scale coupling system

JOINT AND FOLDABLE STRUCTURES EMPLOYING THE SAME

Playpen hub assembly and playpen using the same

Tube folder

Articulating Handle Assemblies for Cleaning Tools and Methods of Use

Column and hinge assemblies therefor

Lock device in an articulated joint for a foldable ladder

Folding slider joint for elongated structures

Folding support member of handlebars of a cart for a person to ride on

Baby carriage folding mechanism for a folding baby carriage