6. ParkerVision ( PRKR) Company Profile: ParkerVision develops RF technologies that have low power consumption for 2G, 3G and 4G wireless communications. Shares of ParkerVision surged in July after the company announced it is suing mobile chipmaker Qualcomm ( QCOM) for patent infringement. The complaint accuses Qualcomm of "objective recklessness in its infringing activity and seeks an award of exemplary damages, attorneys' fees, and costs in bringing this action." Share Price: $1 (Dec. 2) 2011 Total Return: 120% Analyst Ratings: No research analyst follows ParkerVision. TheStreet Ratings gives ParkerVision a "sell" based on "generally disappointing historical performance in the stock itself and poor profit margins."