A U.S. jury awarded International Business Machines Corp. $82.5 million after finding that Groupon Inc. infringed four of its e-commerce patents. Friday\u2019s verdict is a boon to IBM\u2019s intellectual-property licensing business, which last year brought in $1.19 billion for the company, holder of more than 45,000 patents. Groupon fell 7.8 percent to $4.84 in New York trading. IBM sued Groupon for $167 million, accusing it of building its online coupon business on the back of the IBM e-commerce inventions without permission. Midway through their first full day of deliberations in Wilmington, Delaware, jurors sided with IBM, finding that Groupon infringed the patents intentionally. The ruling means the judge can increase the damages award. "IBM invests nearly $6 billion annually in research and development, producing innovations for society," IBM spokesman Doug Shelton said after the verdict. "We rely on our patents to protect our innovations." IBM shares fell 1.1 percent to $145.15. Groupon is weighing its options and considering post-trial motions and an appeal, said spokesman Bill Roberts. "We continue to believe that we do not infringe on any valid IBM patents," he said. "To the extent these patents have any value at all - which we believe they do not - the value is far less than what the jury awarded." Prodigy Service Two of the patents came out of the Prodigy online service, which started in the late 1980s and predated the web. Another is related to preserving information in a continuing conversation between clients and servers. The fourth is related to authentication and expires in 2025. IBM argued during the two-week trial that companies have paid from $20 million to $50 million for licenses to use its thousands of patents, including tech giants such as Amazon.com Inc., Alphabet Inc.\u2019s Google, Facebook Inc., Twitter Inc. and LinkedIn Corp. Groupon didn\u2019t seek IBM\u2019s permission. The trial marked the first time in at least 20 years that a patent lawsuit filed by IBM has made it to the start of a jury trial, Shelton said. The case was closely watched in the online advertising and marketing sector. At least 10 companies - including Go Daddy Operating Co. LLC, LinkedIn and Twitter - asked that information related to their prior IBM patent deals not be made public. Recent reforms designed to fight abuses in the patent system have made it harder for companies to protect their intellectual property, John Desmarais, an IBM lawyer, said in an interview after the verdict. That\u2019s encouraged firms to resist IBM\u2019s demand for a licensing fee. "It\u2019s put companies like IBM, who have real portfolios, real R&D investment dollars, in a situation where they have to go to court,\u201d Desmarais said. Although IBM emerged intact from the Groupon trial, he said "it took years and millions of dollars when it should have taken a couple of meetings.\u201d Armonk, New York-based IBM reached a confidential settlement in December with Priceline.com, part of Booking Holdings Inc., on three of the same four patents. U.S. District Judge Leonard Stark, who also presided over the IBM-Groupon trial, ruled in October that Priceline didn\u2019t infringe the fourth patent. IBM appealed.