Inventor Can't Be Sued For Disavowing Patent, Fed. Circ. Says

Law360, New York (February 11, 2013, 4:08 PM EST) -- The Federal Circuit ruled Monday that an inventor who assigns a patent to a company, then later attacks that assignment's validity as a witness in an infringement case, cannot be sued under federal patent law, tossing a Semiconductor Energy Laboratory Co. Ltd. suit.

In a precedential opinion, the appeals court upheld the dismissal of SEL's case, which sought a judgment that Yujiro Nagata — a co-inventor of a patent on semiconductor technology that is now assigned to SEL — violated federal patent law by challenging the...
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