Man:  Fracking Valve Patent Is Unenforceable Because It Uses His ‘Fundamental Idea’

(August 27, 2021, 2:30 PM EDT) -- PITTSBURGH — A man who contends that he has an ownership interest in intellectual property that is used in a relief valve system for hydraulic fracturing on Aug. 25 filed a lawsuit in Pennsylvania federal court against a company that sells a product that performs the same function, contending that the patent for the device in question is based on his “fundamental idea” and, therefore, the patent is unenforceable....