VirnetX Plunges After Patents Deemed Invalid in Apple Dispute

  • U.S. patent office says all four patents are invalid.
  • Apple patent case scheduled for retrial in Texas Sept. 26.

VirnetX Holdings Corp. plunged almost 14 percent on Friday after four of the patents it claimed Apple Inc. had infringed were deemed invalid by the U.S. Patent and Trademark Office.

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