Verizon sued Vonage for patent infringement in June 2006. Professor Steven Shavell of Harvard testified on behalf of Verizon regarding damages and the need for a permanent injunction. The jury found infringement, awarded $58 million in damages, and the judge awarded a permanent injunction. The judge signed the permanent injunction order on April 6 and required Vonage to stop accepting new customers pending appeal.
- Intellectual Property