After 13 months of maneuvers, invective and more than $100 million in combined expenses, Oracle's ( ORCL) bid to scoop up rival software vendor PeopleSoft ( PSFT) is in the hands of a federal judge. On Tuesday afternoon in San Francisco, U.S. District Court Judge Vaughn Walker heard more than three hours of closing arguments in the government's antitrust suit aimed at blocking the $7.7 billion hostile takeover. Walker probably won't hand down a decision until sometime next month. The trial ended much the same way it began, with lawyers for Oracle and the Department of Justice making alternate presentations in Walker's windowless courtroom on the 17th floor of San Francisco's Federal Building. The 59-year-old judge, an expert in antitrust law, peppered the attorneys with questions, sounding equally skeptical about arguments raised by both sides. The government claims an Oracle takeover of PeopleSoft would stifle competition in the software market, leading to higher prices and a slowing of innovation. "Customers are facing huge, huge dangers," Claude Scott, the Justice Department's lead lawyer, argued during a 75-minute presentation. Scott argued that just three companies -- Oracle, PeopleSoft and SAP ( SAP) -- have the advanced human resources and financial management software needed to automate back-office functions in complex business enterprises. PeopleSoft CEO Craig Conway was also in court Tuesday, and said: "From the beginning, the case has been all about harm to the customers and the industry." Conversely, Oracle claimed over and over again during the four-week trial, and again during closing arguments, that numerous software companies and system integrators are significant competitors, and their presence in the market will keep Oracle's pricing power in check. "This is a vibrantly competitive market," Oracle's lead attorney Dan Wall told the judge. "There's no evidence that they customers would pay more rather than turn to a Lawson ( LWSN) or a Sage Group ," he said, referring to the U.K.-based supplier of accounting and business management software.