Draper Fisher Jurvetson has quietly exited its investment in Polaris Wireless, a Mountain View, Calif.-based company that uses RF pattern-matching technology to determine the location of any wireless device (primary application is for E-911 compliance).Draper Fisher Jurvetson has quietly exited its investment in Polaris Wireless, a Mountain View, Calif.-based company that uses RF pattern-matching technology to determine the location of any wireless device (primary application is for E-911 compliance).