An aggressive year of acquisitions and strong demand for existing products fueled growth. 3D Systems Corporation (NYSE: DDD) saw revenue increase by 44% in 2011, compared with the previous year. The year was busy with acquisitions, which were responsible for much of the growth. Revenue in the fourth quarter was also strong. The stock price jumped 17% to 24.57 on the … [Read more...] about 3D Systems full year revenue up 44% in 2011