in chair construction with such things as all-metal folding chairs, metal-legged chairs, the Slumber Chair, moulded plastic chairs and ergonomic chairs. The recliner became a popular form, at least in part due to radio and television. In the 1930s, stair lifts were commercially available to help people suffering from Polio and other diseases to navigate stairs.

The modern movement of the 1960s produced new forms of chairs: the butterfly chair