0000950135-08-001746 10-K 6 20071231 20080313 20080313 IPG PHOTONICS CORP 0001111928 3674 043444218 DE 10-K 34 001-33155 08684907 50 OLD WEBSTER ROAD OXFORD MA 01540 5083731100 50 OLD WEBSTER ROAD OXFORD MA 01540 10-K 1 b68195ipe10vk.htm IPG PHOTONICS CORPORATION EX-21.1 2 b68195ipexv21w1.htm EX-21.1 LIST OF SUBSIDIARIES EX-23.1 3 b68195ipexv23w1.htm EX-23.1 CONSENT OF DELOITTE & TOUCHE LLP EX-31.1 4 b68195ipexv31w1.htm EX-31.1 SECTION 302 CERTIFICATION OF CEO EX-31.2 5 b68195ipexv31w2.htm EX-31.2 SECTION 302 CERTIFICATION OF CFO EX-32.1 6 b68195ipexv32w1.htm EX-32.1 SECTION 906 CERTIFICATION OF CEO & CFO