IBM has sued online deals marketplace Groupon for infringing four of its patents, including two that emerged from Prodigy, the online service launched by IBM and partners ahead of the World Wide Web.

IBM has sued online deals marketplace Groupon for infringing four of its patents, including two that emerged from Prodigy, the online service launched by IBM and partners ahead of the World Wide Web.

IBM filed a lawsuit against Chicago e-commerce company Groupon Wednesday for patent infringement, in part based on technology it says Groupon stole from Prodigy, an online service and AOL competitor ...