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Barracuda countersues Trend Micro

Barracuda Networks said Wednesday that it’s filed a countersuit against Trend Micro, which filed patent infringement charges against the company with the U.S. International Trade Commission last November. In the suit, filed in U.S. District Court in central California, Barracuda claims that Trend Micro infringed on three patents it bought from IBM. The patents cover methodologies for virus protection, spam and Web filtering, and intrusion detection.

Trend Micro, meanwhile, claims that Barracuda’s Web Filter and Spam Firewall products infringe on Trend’s 600 patent, which covers a process that scans and removes viruses as they move through an SMTP or FTP proxy server. Barracuda counters that the patent is invalid and that Trend is trying to collect on Barracuda’s use of the open source Clam AV. Trend Micro defended the 600 patent against Fortinet, agreeing to a settlement in 2006. A Trend Micro spokesman declined to comment Thursday on Barracuda’s lawsuit.

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