New York: Motorola Inc is seeking to ban imports of Research In Motion Ltd's BlackBerry smartphones into the US that it claims infringe its patents.

Motorola, the largest US mobile-phone maker, said it filed a complaint with the US International Trade Commission, citing unfair trade practices and infringement of five patents.

The patents relate to some early-stage innovations developed by Motorola in key areas such as Wi-Fi access, application management, user interface and power management, that are now being used by RIM, Motorola said in a statement. The technology allows better connectivity at a lower cost, the company claims.

Litigation

"We've not been able to convince RIM over two years in litigation elsewhere to reach a reasonable settlement so we've taken it to the ITC to stop its infringement," Jonathan Meyer, Motorola's senior vice president of intellectual property law, said in an interview.

He said the two companies had a licence agreement in place from 2003 to 2007 and haven't been able to reach terms since then. Motorola and RIM have been suing each other in recent years.