Ohio Willow's Prosthetic-Cushion Patent Ruled Invalid
At issue is U.S. Patent Number 5,830,237, titled “Gel and cushioning devices,” which involves partially gel-covered coverings for amputees employing a prosthesis. The patent describes a device in the form of a cushioned sock that fits over an amputated stump, so as to provide a comfortable buffer between the prosthesis...

