Fourth Circuit

U.S. Court of Appeals for the Fourth Circuit

Fourth Circuit, Trade Secret, Federal, Trademark, Federal

dmarcian, Inc. v. DMARC Advisor BV — Fourth Circuit Upholds Cross-Border IP Injunction Under Abitron’s Conduct Test

The Fourth Circuit affirmed a preliminary injunction against a Dutch software company’s use of an American company’s brand and trade secrets, holding that Abitron Austria’s conduct-focused test for the territorial reach of U.S. IP law is satisfied where the defendant directly targeted U.S. customers online.

Fourth Circuit, Utility Patent

Vir2us v. Sophos — Fourth Circuit: Shared Source Code Alone Does Not Make Post-Acquisition Products ‘Derivations’ Under Patent License

The Fourth Circuit affirmed that Sophos’s post-acquisition antivirus products were not “derivations” of the named containerization products in a 2016 patent license agreement, even though they shared some common source code, because the shared code was inactive in the original products and the newer products did not originate from them.

Copyright, Fourth Circuit

Deque Systems v. BrowserStack — Fourth Circuit Affirms Summary Judgment After Copyright Plaintiff’s Repeated Failure to Disclose Damages

The Fourth Circuit affirmed summary judgment for BrowserStack after Deque Systems repeatedly failed to disclose its damages calculations in a copyright infringement case over web accessibility software, holding that the district court properly excluded Deque’s damages evidence under Rule 37(c)(1) and that Deque failed to raise a genuine dispute on injunctive relief.

Scroll to Top