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The question presented in this case is… whether the act of filing an application for a U.S. patent at the USPTO is sufficient to subject the [Canadian] filing attorney to personal jurisdiction in a malpractice claim that is based upon that filing and is brought in federal court. For the reasons discussed below, we conclude that it is.
— Judge Lourie of the US Court of Appeals for the Federal Circuit in Touchcom Inc. et al v. Bereskin & Parr et al.,
