Another day, still another lawsuit. Apple has filed a lawsuit against three companies it alleges are selling knockoff power adapters for MacBooks and MacBook Pros, reports “CNET” (http://news.cnet.com/8301-13579_3-20010156-37.html?part=rss&subj=news&tag=2547-1_3-0-20).

The lawsuit was filed in U.S. District Court for the Northern District of California on Thursday. It names Brilliant Store, Sunvalleytek International, and Hootoo.com as defendants. Apple cited a patent it received in 2003 for the power adapter design, notes “CNET.”