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www.fdanews.com/articles/148658-ohio-willow-rsquo-s-prosthetic-cushion-patent-ruled-invalid

Ohio Willow’s Prosthetic-Cushion Patent Ruled Invalid

August 13, 2012
An Ohio federal judge ruled Friday that Ohio Willow Wood’s patent for liners used in certain prosthetics was invalid, handing a win to rival Alps South in a protracted fight over technology for amputees.
Law360