Sept. 6 (Bloomberg) -- Motorola Inc., the biggest U.S. maker of mobile phones, was sued by a unit of Fujifilm Holdings Corp. over claims the company infringed patents for camera-phone lenses.

Motorola is selling more than 20 mobile phone models, including its popular Razr 3, that use lenses protected by three patents awarded in 2004 and 2005, Fujifilm's Fujinon unit said in the lawsuit filed yesterday. Fujinon asked a judge to block Motorola's infringement and award unspecified damages.

``By its infringing conduct, Motorola has made unlawful gains and profits,'' Fujinon said in a complaint filed in federal court in Wilmington, Delaware. ``Motorola has thus caused Fujinon irreparable damage.''

Fujinon last month settled a similar suit against LG Electronics Inc., Asia's second-largest maker of mobile phones behind Samsung Group, over photographic lenses. Terms of that agreement weren't disclosed.

Officials of Schaumburg, Illinois-based Motorola had no immediate comment.

Fujifilm, based in Tokyo, is the world's biggest maker of liquid-crystal display film. Fujinon, based in Saitama, Japan, is the optical-equipment unit of the company.

Fujifilm's American depositary receipts, each worth one ordinary share, rose 48 cents to $42.21 at 4 p.m. in Nasdaq Stock Market composite trading. Shares of Motorola rose 23 cents to $17.42 in New York Stock Exchange composite trading.

The case is Fujinon Corp. v. Motorola Inc., 07-cv-00533, U.S. District Court District of Delaware (Wilmington).

To contact the reporter on this story: Sophia Pearson in Wilmington, Delaware Spearson3@bloomberg.net

Last Updated: September 6, 2007 16:25 EDT