The failure of the United States Golf Association to certify that a new device for gauging wind on the golf course conforms with the Rules of Golf does not constitute a violation of antitrust laws, the federal District Court in Minnesota has ruled. The USGA uses its Rules of Golf in the 13 national championships it conducts each year and the PGA Tour and other entities conducting championships usually apply the Rules. More than 25,000 golf courses and millions of golfers voluntarily follow the Rules. A company called Windage, LLC developed a a small, golf-ball-shaped plastic container with talc powder inside to help golfers gauge wind direction by squeezing a puff of powder into the air,...