826 A.2d 570 JOAN M. SMART, EXECUTRIX UNDER WILL OF JOHN E. SMART a. v. AMERICAN WELDING AND TANK COMPANY, INC. a. No. 2002-110Supreme Court of New Hampshire GraftonArgued February 12, 2003 Opinion Issued June 6, 2003 1. Commerce — Interstate Commerce — Federal Preemption When a case involves transportation in interstate commerce, federal law […]