(May 5, 2016, 4:34 PM EDT) -- WASHINGTON, D.C. — In a petition for writ of certiorari filed March 28 with the U.S. Supreme Court, several heavy equipment manufacturers ask the high court to reverse a New Hampshire Supreme Court ruling upholding a law that voided pre-existing contracts between the petitioners and their New Hampshire dealers (Deere & Co., et al. v. State of New Hampshire, No. 15-1213, U.S. Sup.; 2016 U.S. S. Ct. Briefs LEXIS 1428)....