Proto Labs (NYSE:PRLB) reported quarterly earnings of $0.47 per share which beat the analyst consensus estimate of $0.39 by 19.9 percent. This is unchanged from the same period last year. The company reported quarterly sales of $135.366 million which beat the analyst consensus estimate of $133.833 million by 1.15 percent. This is a 7.76 percent increase over sales of $125.619 million the same period last year.