RADER, Circuit Judge. Halliburton Company (Halliburton) sued Schlumberger Technology Corporation (Schlumberger) for infringement of U.S. Patent Nos. 4,388,529 (’529 patent), 4,409,-481 (’481 patent), and 4,424,444 (’444 patent). These patents embrace tools and techniques for neutron logging of oil wells. Specifically, the patents disclose use of high energy neutrons to measure…
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