Another day, another patent lawsuit for Apple. This time, the target in the headlights is the multi-talented iPhone’s digital camera.

St. Clair Intellectual Property Consultants has filed a lawsuit against Apple in the United States District Court in Delaware, claiming the Cupertino company has violated several of its digital camera patents related to the iPhone.

Four separate patents are in question, including the ‘459, ‘219, ‘010 and ‘899 patents that St. Clair holds, according to The Loop.

To no one’s surprise, St. Clair is not new to the patent infringement lawsuit business. They sued Sony in 2001 for infringing on the same patents and won a $25 million judgement against the Japanese behemoth. They lined up Canon in their sights back in 2003 and was awarded even more: $34 million in damages.

And the buck doesn’t stop there. Flush with damages from those cases, they’ve gone after every major camera maker on the planet including Fuji, Kyocera, Minolta, Nikon, Olympus and Casio. Lawsuits have also been filed against Samsung, Panasonic, Nokia, HP, Kodak, LG, Motorola, RIM and Palm, among many others.

Needless to say, many of those companies entered into licensing agreements with St. Clair to avoid a protracted court battle. In Apple’s case, St. Clair is seeking damages and a jury trial.