2016 article with more details: <a href="https://arstechnica.com/tech-policy/2016/03/ibm-sues-groupon-saying-it-infringes-patents-related-to-1990s-prodigy-service/" rel="nofollow">https://arstechnica.com/tech-policy/2016/03/ibm-sues-groupon...</a><p>It links to the original lawsuit (<a href="https://arstechnica.com/wp-content/uploads/2016/03/IBM.Groupon.Patent.Complaint.pdf" rel="nofollow">https://arstechnica.com/wp-content/uploads/2016/03/IBM.Group...</a>) as well as the 4 patents: 5,796,967, 7,072,849, 5,961,601, and 7,631,346
Just purely out of curiosity when reading this. It seems like a lot of companies license these specific patents (eg. Twitter, Alphabet) as mentioned in the article. Does anyone know what patents they were referring to?