U.S. Supreme Court justices signaled on Monday they may issue more pro-business rulings giving companies wide latitude to use arbitration to resolve disputes with employees, customers or other businesses rather than the courts. The nine justices heard arguments in two cases testing the scope of company agreements forcing disputes to be handled by an arbitrator instead of a judge, one involving a California lamp retailer and the other involving a Texas dental equipment distributor. In their questioning of the parties in the cases, the justices indicated a reluctance to limit the ability of companies to keep such disputes out of court. The conservative-majority Supreme Court in recent years has issued a series of decisions endorsing the power of arbitration and curbing class-action claims of various types.