A retired Georgia Institute of Technology professor has sued Lyft for patent infringement, Reuters reports. The professor, Stephen Dickerson, filed his complaint with the New York Southern District Court on Monday through his company RideApp, and it claims that Lyft's business model infringes on Dickerson's ride-sharing patent, which he filed for in 2001. The patent was granted in 2004 and the rights were held by Georgia Tech until Dickerson reacquired them earlier this year. "Professor Dickerson was a transportation visionary," his attorney, Marc Kasowitz, said in a statement. "Lyft's infringement is entirely unwarranted and unlawful."