Toyota Motor Corp.'s FT-EVII electric concept vehicle during a media preview in Hachioji City, Tokyo, Japan

A photographer takes a picture of Toyota Motor Corp.'s FT-EVII electric concept vehicle during a media preview in Hachioji City, Tokyo, Japan, on Tuesday, Sept. 15, 2009. Toyota Motor Corp., the world's largest maker of hybrid vehicles, faces a potential U.S. import ban on Prius and other hybrid models as trade officials begin a patent-infringement investigation.

Toyota FT-EV