MARLBOROUGH, Mass. (AP) — MARLBOROUGH, Mass. (AP) — IPG Photonics Corp. (IPGP) on Tuesday reported third-quarter earnings of $20.3 million. The Marlborough, Massachusetts-based company said it had profit of 47 cents per share. Earnings, adjusted for one-time gains and costs, were 61 cents per share. The results topped Wall Street expectations. The average estimate of...