Workhorse Group to Exhibit E-GEN(TM) Electric Truck Chassis and Horsefly(TM) Delivery Drone at ACT Expo 2015 CINCINNATI, Ohio, May 1, 2015 (GLOBE NEWSWIRE) -- via PRWEB - Workhorse Group Inc. (OTCQB:WKHS) announced today that it will be exhibiting its E-GEN electric truck chassis and its Horsefly delivery...