Vivint Smart Home, a Provo, Utah-based smart home company, has filed a patent infringement lawsuit against ADT in the United States District Court for the District of Utah.

In the complaint, Vivint asserts that ADT’s Pulse, Control and Blue security systems infringe six of Vivint’s U.S. patents related to security and smart home technology.

“Vivint invests millions of dollars to develop best-in-class products and services for its customers, as well as to patent and protect this technology,” Vivint said in a statement. “We will vigorously protect and defend our unique intellectual property and innovations.”

Vivint is seeking damages for ADT’s infringement of the asserted patents, claiming the company lost sales due to the infringement. Additionally, they are also seeking attorney’s fees from the court.

“ADT believes the claims asserted by Vivint are completely without merit and intends to vigorously defend against the lawsuit,” ADT said in a statement. 

This is not the first time Vivint and ADT have sought litigation against each other. In 2018, Vivint payed ADT $10 million to settle a deceptive sales lawsuit. Last year, ADT filed an unfair competition suit against Vivint in Florida for the same reason, saying that Vivint has an “engrained culture of deceptive sales practices.”

ADT was named SDM’s Dealer of the Year in 2017. Vivint was named Dealer of the Year in 2011.

Editor's Note: This story was updated to add comment from ADT.