Ohio Willow's Prosthetic-Cushion Patent Ruled Invalid

Law360, New York (August 10, 2012, 8:56 PM EDT) -- An Ohio federal judge ruled Friday that Ohio Willow Wood Co.’s patent for liners used in certain prosthetics was invalid, handing a win to rival Alps South LLC in a protracted fight over technology for amputees.

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...
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