‘Now it's doing so in two places: A second version of the prototype just opened in Chestnut Hill, Mass.’.‘By late 1937 he had designed, built and successfully tested both a semiauto rifle and a prototype light machine gun.’.‘This device, at the prototype stage, is expected to cost $20 and act as a Web access device.’.‘One big drawback: the prototype emission control device they tested cost thousands of dollars.’.‘the prototype of all careerists is Judas’.