In attempts to develop the Prodigy online service, launched by IBM with partners in the 1980s, the inventors of U.S. patents 5,796,967 and 7,072,849 developed new methods for presenting applications and advertisements in an interactive service that would take advantage of the computing power of each user’s PC and reduce demand on host servers, such as those used by Prodigy, IBM said in its filing. U.S. patent no. 5,961,601 was developed as part of IBM’s bid to find a better way of preserving state information in Internet communications, such as between an online merchant and a customer, according to IBM. IBM said it had notified Priceline in a letter in October 2011 that it was infringing the ‘967, ‘849, and ‘601 patents. It subsequently informed Priceline that it also infringed the ‘346 patent. “Priceline has refused to engage in any meaningful discussion on the merits, resorting instead to delay and non-responsive answers,” IBM said in the filing. Get the full story at CIO