Sending a cease-and-desist letter to a party believed to have infringed on a patent does not necessarily establish jurisdiction in the alleged infringer's state, a federal appeals court found. The court upheld a lower court's ruling in favor of the patent holder, which had challenged the alleged infringer's filing of a lawsuit in its home state based on a claim of jurisdiction being established. "The plaintiff must show that the defendant purposely directed its activities at residents of the forum and that the plaintiff's claim arises from or relates to those activities," the appeals court ruled.

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